I think it all depends on the dog but at a year it's an immature dog, at 2 it's a little more mature but I like to consider a dog comes to his maturity at 3.JMO

I'm glad someone asked that question. I have been reading Ed Frawley's tips on training and so forth and maybe I am expecting too much on my dog. She just turned a year and she is a smarty but still ignores my commands at times and her loose lead walking is good some days, bad others. I guess I just have to keep training fun and have more patience? Corrections are still called for though right?

Yes, you want to correct her but always (especially at that age) reward as soon as she gives you what you want.I correct at that age in a way that it's quick and re-enforced with a reward as soon as my dog complies.At a year everything you do now will be her "foundation" for alot of things and she'll remember that.
If on her recall it's always a good thing and a reward is there ,she will always associate the recall with a reward.When my male yaggo comes to me I simply pet him ,let him know I'm glad he's there(and at times he gets his tug).When he was younger I would throw a toy or use food as a reward, but now (almost 4)he knows that coming to me is a good thing and does not ever recall anything bad ,so it's a good place in his mind..If you apply all your commands in such way , you should have great results, don't rush anything, consistency is the key to success You sound like you are on the right track Alex, keep it up

Thanks for your advice Angelique. I'm glad it seems I'm on the right track. I'm 31 yrs old and she is my first dog, can you believe that? So, I want to make sure I train her correctly and minimize my mistakes. I've always wanted to have a dog with off-leash control. I had been told age has a lot to do with your dog listening to you so I guess I am just being impatient. Especially w/a Boxer, I've read they take longer to mature than most breeds. I'm glad I found this site. The people and info here are amazing.

On recall work, I train in a long hallway at home or after our walk, we go to a fenced in tennis court and I let her run and call her from time to time. There are times when she ignores my call & runs from me when I walk to her to grab her, but then when I run the opposite way, she runs right after me. I never tell her to come when she's in trouble, I just grab her. Do you think that will just get better w/age?

Yes and with consistency.Don't ever let her blow you off and ignore it.When Bandit was a very young pup I would call him simply by his name and run off and he would run so fast thinking I was leaving him behind.It has worked wonders for me , when I call him he comes so fast thinking that I am going to take off so now at his age today( 15 months) he is conditioned to that response.Club members used to praise me on the fact that at 16 weeks I could have him off leash to hang out and he never took off and always kept his eyes on me.(he was making sure I was going nowhere )
You can condition your dog to do many good things if it's applied in a positive way and at an early age too.I don't know much about Boxers but I'm sure like many otheres with maturety he'll get better and more willing.When he blows you off on a recall is because 1)lack of reward 2)off leash too early 3) lack of consistency
Have your dog on a long line until he understands that "come" means exactly that.And when he comes use a treat or a toy he's crazy about and play with him.When your dog is not complying look back on what you did wrong and fix it, make it motivating..

Wow! 15 mos?! That's awesome. My dog is going to be 14 mos April 5th and she is far from recalling like that. Congrats!

I think she knows the come command by now because when we train in the hallway or tennis court, I put her in a sit then walk away from her facing the other way and she sits. I will yell "sit!" and she doesn't move, when I yell "come!" she runs hard and fast to me. So the fact that she ignores my call at times must be lack of reward & off leash too early. Hmm...I don't know.

Most likely, you need a motivational tool for her to come and not think twice about it.That is why when you hear offleash too soon is because she comes when she wants to at times.Work on her for a while on a long line and get your recall secure then you can go back off leash ONCE your recalls on line are perfect.Just a little homework for you