If you're talking about PPV movies in the 500 range being in letterbox, I routinely see maybe a fourth of them in letterbox. I prefer letterbox, and I always look for LBX in the title in the guide, along with DD (dolby digital). For example, the last movie I watched was titled in the guide as "Miss Congeniality 2 (DD, LBX)"
Usually if they're going to run a PPV movie in LBX at all, it's only for a short while when they first start running the movie; then they'll run the standard version for thirtyleven months on sixteen stations . I agree and wish they'd run all movies in LBX using the OAR the movie was intended to have.