Sure, it can take 6 hours if you're doing more of a scripted type scene, but every shoot I've been to has been ~45 minutes of filming cut down to a 30 minute scene in post (it was all reality porn). There was definitely some waiting involved though.

I'm not saying you're wrong about the rates (and it does seem like they've dropped a lot lately after looking into it), but I'm either grossly misremembering or we paid a premium for our talent. I believe it was the latter, because the company definitely liked to spend money.