Raiders are built differently. But purely from a talent standpoint - right now, honestly, Tebow, until Palmer proves he's got something left. Would I take Tebow over, say, Cassel? Probably not. No one is saying that Tebow is the second coming of Marino or Elway (at least they shouldn't be), but if he is able to use the skills he does possess to put his team in a chance to win every week, why shouldn't he get credit for that?
It's like saying a pitcher who is 25-3 with a 4.25 ERA sucks. Wins aren't everything, but if he's got 25, it means he pitches well enough every start to keep his team in a position to win. I know many managers who will take that. Is he an ace? Certainly not, but still clearly an effective pitcher. (And no, I'm not saying Tebow's 25-3, but point is, one or two stats don't always tell the whole story).
And again, as for the 15-0 deficit - guess what? The WHOLE TEAM had them in that hole, including Prater - not just Tebow. But when they went all in for that last 5 minutes and beyond, guess what? Tebow and the boys got it done. Hopefully that encourages Fox to take a few more chances. If you ask me, the Broncos defense was awesome yesterday - they won that game. But Tebow managed it well and kept the ball out of the Dolphins hands. He wasn't great by any standard, but he did the job he was asked to do and did it successfully. In that context, he came through.