It doesn't tend to work that way in the polls as we get into the season. It turns more into a process of elimination: lose, and drop. Survive, and slide up to fill the gap.
Consider the case where we beat Florida. We're #11, and we just beat Florida. Meanwhile,
#1 UGa beats Kent State something like 60 to 0.
#2 Bama beats Vandy just as badly.
#3 Ohio State beats Wisconsin solidly.
#4 Michigan beats Maryland by 30 points.
#5 Clemson destroys #21 Wake Forest.
#6 Oklahoma beats Kansas State by a score of 52-14.
#7 USCw thrashes Oregon State.
#8 Kentucky wins over Northern Illinois something like 60-3.
#9 Oklahoma State beats #17 Baylor handily.
#10 Arkansas beats #23 A&M by three touchdowns.
Tell me...under those circumstances, who do we leapfrog for beating #20 Florida? You say at least two spots. Pick the two teams we pass, and explain how us beating #20 Florida is that much more impressive to all these poll voters than whatever the other teams did.
Okay? Go.