I've been having conflicting answers on this. My personal take is that whatever's more efficient is best. I've been using ASP as my primary programming language for the past year or so, but I need something to speed up my programming process. The advantages of ASP.net for the programmer are fairly appealing, but I'm not impressed with the lack of simple portability. I'm also not impressed with the speed in any way fashion or form. I was thinking maybe PHP may be my best solution but I'm trying to start a company currently and have little/no time to learn a new language right now.

btw., I would go ahead with partial ASP.net implementation if it could provide real-time interaction with users without the use of refreshing the screen.