If Warner could put the ball in the end zone for TD's, he'd surely be top 3. They still can't score TD's though as evidenced by the fact that Nick Novak had 3 FG's last week against freaking SF, and Kurt only had 1 TD.
They are in the same situation as St. Louis as far as passing is concerned, meaning that they do it all the time. In Arizona's case, they just have no speakable running game and are essentially forced to throw. The Rams might be able to run if they wanted to (although that O-Line is pretty suspect these days)...they just choose to throw.
Both have favorable schedules for the playoffs (Houston, Philly for ARZ, Philly/SF for STL). I actually have Warner on my main team along with Hasselbeck AND Bulger, so I'm waiting to see what happens there. They all have great playoff schedules, but Hass might not be needed and Bulger may not be back. Kurt could be my playoff QB - lord help me.