My guess is he was saying Floridas schedule was the toughest
...and I have no idea how. They have played 3 teams in the RPI top 50, all of which they lost. They have played 5 teams above RPI 150 and another at RPI 133.
The RPI only looks at wins and where they occurred and strength of schedule. Therefore, you can collect 20 wins against crap teams as long as you played your losses against top 35 teams and have a good RPI. Now, I know that it is an index, so you have to look at wins against other RPI teams. The simple fact that a team is ranked in the top 25, without more, is almost meaningless.