Anyone who told you that is just another internet moron spouting garbage based on no information. If anything the 04+'s are better in many ways as GM finally started fixing some of the common issues.
Let me put it to you this way, just because someone has a problem, doesn't mean everyone has a problem. I have had people tell me AWD sucks in the snow, because they had a AWD DSM and it slid sideways into a ditch and they couldn't go anywhere. Once asked what kind of tires they had, you got your answer as to why THEIR car sucked in the snow. Because they were AWD they thought running summer only high performance tires would still get them around in snow and ice.
