Well, it might. But personally, I'd say it gets better with training. I mean, some dogs are going to calm way down with age, but others may not. So I wouldn't bank on age fixing the problem. Based on what you describe, your dogs is finding WAY more reinforcement in the environment (not hard to do on an agility course!) than with you. So you need to help the dog understand that all good things come from you.
RATCHX3 High Jinks vom Neuanfang - Gotchya Day: 1/23/2013 DN, SG, SR, CA
Inspire Spark to Ignition! (Ignite) Gotchya Day: 10/8/2016
C-ATCH Pimg - RATO, UJJ (x2), DJX, HIT, CA, CGC, High in Games, Reserve High in Standard- CPE Nationals 2014