Having worked in Hollywood myself for about a year this is about right. While the talent (there term for actors) and studio big shots are mostly left wing the technical people are regular Americans and run conservative in views
I was working for long hours and many days at ABC TV Hollywood in the broadcast bunker during the 2000 election and the great chad war.
Of the 15 or so broadcast engineers there I say 14 were conservative to very conservative (funny as hell to see them yelling an there own newscasts bias)
PS The talent and studio big shots treat everone else (the "little people") like shit...far worse then any other biz I've ever seen... so much about the left carring more about regular people
I've always been partial to crewing myself... :-)