I re-bought gears 2 so I could try out TU3 and see if it would get me back into it again. But my experience has certainly been mixed. Ive had about 4/25 games that were ok, the rest have been lag fests. I have 10mb cable broadband which is fine on everything else incuding Gears 1 so it's not that.
Ive had one game where my mate spawned with no gun and another match where me and Benyameano were both deducted 1500 for 'incomplete match' when we played it out till the end
Also I have had problems a few times where I have tried to shoot someone revving a chainsaw at me and they have just gone straight through me instead, however when they have done it to me it stopped me from revving and killed me
Oh and I got downed from a 1 hit melee once as well
I would say that it has improved from first release but its still a long way off from being finished. I seem to have a certain level of hunger for the game back, but not enough to make it a constant play...yet