Not so sound alarmist (and I would feel safe leaving it out), but ... a custard-type pie like pumpkin should be refrigerated for longer (over 4 hours) storage. But, if you aren't feeding about people with compromised immune systems (older folks, young kids, etc.) *and* you are keeping a scrupulously clean kitchen (as I'm sure you do) you should be fine. My worry is always cross contamination: a few stray drops of raw turkey "juice" (ew) and you've inoculated your pie with nasties. Sorry for being so cheerful. :-)

ABSOLUTELY! Enjoy your pie!

Yes, it'll be fine. When cool, just set it in a cooler part of the house. Happy Turkey Day, y'all!