I don't know too many Texans fans that think he's overrated, but I know many who bristle at the harping that used to go on about Schaub being underrated, particularly after his 4700 yard season.
Flacco has one stat over Schaub that we all want Schaub to have, and that's playoff wins. He has a bunch. I'm not a Flacco fan, and I actually hate when people ascribe wins and losses to the QB, but you have to admit that Flacco steps it up in the playoffs. If we can't have a team with an elite QB, then I want a complete team that at least has a QB that steps it up when it really counts. How many chances did the Texans have to win home field advantage last season? Three? More? They controlled their destiny throughout the last half of the season, and Schaub buckled under the pressure. Much of the rest of the team did as well, but we're talking QB here.
People forget that Flacco has had four previous years of playoff experience. AND was surrounded by pretty good talent - especially at RB - and backed up by a pretty good defense.
Let's look at Flacco's playoff history....
2008/09 - 2-1
@ Miami (W, 27-9) - 9-23 for 135 yds, 0 TDs, 0 Ints
@ Titans (W, 13-10) - 11-22 for 161 yds, 1 TD, 0 Ints
@ Steelers (L, 14-23) - 13-30 for 141, 0 TDs, 3 Ints
2009/10 - 1-1
@ Pats (W 33-14) - 4-10 for 34 yds, 0 TDs, 1 Int (they ran over the Pats for 220+ yds and 3 TDs)
@ Colts (L 3-20) - 20-35 for 189 yds, 0 TDs, 2 Ints
2010/11 - 1-1
@ Chiefs (W 30-7) - 25-34 for 265 yds, 2 TDs, 0 Ints (Flacco finally carries his weight)
@ Steelers (L 24-31) - 16-30 for 125 yds, 1 TD, 1 Int
2011/12 - 1-1
Vs Texans (W 20-17) - 14-27 for 176 yds, 2 TDs, 0 Ints (Yates throws 3 Ints and wastes a 150+ game from Foster and a 100 rcvg game from A.J.)
@ Pats (L 20-23) - 20-36 for 306 yds, 2 TDs, 1 Int (Finally has a decent playoff game and loses to Belichick)
2012/13 - 4-0 this is the only year I would say Flacco actually carried his team thru the playoffs - his fifth shot for a SB ring.
vs. Colts (W 24-9) - 12-23 for 282 yds, 2 TDs, 0 Ints
@ Broncos (W 38-35) - 18-34 for 334 yds, 3 TDs, 0 Ints
@ Pats (W 28-13) - 29-54 for 320 yds, 1 TD, 2 Ints
@ SF (W 34-31) - 22-33 for 287 yds, 3 TDs, 0 Ints
Let's see how he does this year with the heart and brains of that defense gone.