[quote name='clauster' post='81006' date='Oct 29 2007, 08:37 PM']IMHO playing piano (which I had to do for ten years) does not make you better at other instruments, if anything it made the transition to strings harder for me (why can you play the same note/chord in several different places, coordinating two hands to play one note etc etc). It is great for theory though (which if he's got grade three in jazz piano he's got enough technique to explore the rest of theory).[/quote]
I disagree there, i played for 3 years before i picked up bass. Certainly taught me a lot about music and theory, and the extra hand dexterity helped. It doesn't help with the basics of bass playing like fretting noted and your picking action but of course there's more to being a musician than that.