One of those urban legend type things, but by all accounts the CFM will deal with FOD much better than the V2500. I can attest to seeing some pretty bent fan blades on the CFM, and it still getting us home nicely.
Without chucking the same stuff into V2500 in the same scenario, I cant say the CFM fared any better - but it did well.
Apparently less of the "fan growl" from IAE's offering too. Again, unqualified.