As a reccent graduate of teacher training in the UK and as a PhD student/TA in my Uni I'd say yes AND teachers are too reliant.
Someone I know teaching in a high school found the kids at her new school couldn't/wouldn't do anything unless it was written on a powerpoint. Teachers also use it as a 'crutch' if it's all on the ppt they don't have to know it as well (not such an issue at University level but happens in school)
I like a bit of ppt, if there's a lot of technical terms/names/dates etc but for example teaching literature or drama class I wouldn't use one.
Maybe I'm on nobody's side
http://phdconfessions.blogspot.com/