Since it all originates with subjective rankings and equations, that could never be verified by direct competition, it's either 100% or 0% accurate, depending on how you look at it and what you define accurate as. It's almost certainly not exactly how a tournament of all teams would turn out, so maybe it's 0% accurate. But then again it doesn't claim to be, it's only essentially one dude and his computer's opinion...it 100% accurately reflects that opinion.
Numbers I care about:
1. Record
2. Sunbelt Conference Placing
3. Bowl final score