Fast RDLC

Belias

hi everyone, i am developing my first rdlc report ( \:D/ )...better late than never...
i did my standard report before and then i also designed the rdlc layout. I found that the rdlc is a lot faster than the classic client (the report result appears to be the same). Does someone know why?is it normal?
My report is not the easiest but not the hardest...let's say i fill a temptable with a lot of customers and then i do some process on some related tables...
both the rtc and classic client are running on our server.
thanks in advance, i hope it's really so better!