Are there still Page requests errors that happen when script timers are set to fast? In previous years I use to always get PRE's when running crazy panda timers below 8 seconds, but this year it no longer shows PRE's. Did Mturk change something on their platform?
They still exist. Your script setup is probably making more efficient use of the allowed page request rate. MTS Hit Finder + Hit Catcher and Panda Crazy will all display the number of PREs that they've encountered at the top of the page.