Not enough to mean anything. Especially because those few if they exist would be extremely lazy and ignorant and probably don't know much about CFB, they just like to look at the win column as "support" for the program.
I agree that many teams could struggle with this. That's why it's important come end of season to be able to establish some sort of a measuring stick for improvement. How do you gauge a team's improvement relative to the schedule? Plenty of fans will be too emotional to be rational and think any deeper than the win total and numbers on paper. It's too much work when you've already got your mind made up. Much easier to go with whatever supports the idea you already made.