Mike can give ya all the info on the bore axis - he loves to talk about that
Basically, the gun design allows it to come back onto target faster after a shot. Glocks are very popular in competitions.
Also, the Glock 34/35 has a long barrel, long sight radious, a little bit lighter trigger, and extended slide release and extended mag release.
I have 1. It is a very nice gun. It is the only Glock I like (and I have owned other ones in the past)