At the bottom of this article, in the “By the numbers” section, Ebert throws this out there:
What’s his problem? Sure, J. Lo hasn’t made a decent film since Out of Sight, but he gave Changing Lanes 4 Stars and The Sum of All fears 3 1/2 stars, so why the sudden venom? “BaF”?
This sort of pot-shot seems beneath him. Is there any history there? Maybe they snubbed him at Sundance or something?