RAW vs DNG files?

If you shoot 5D mkII, I can tell you the following:

Converting full cr2 RAW til DNG will cut down size (i think it is about 30% less).

HOWEVER... converting an sRAW file to DNG will increase the file size quite a bit (maybe 30-50%), so if you, like me, shoot mostly sRAW1, then stay away from DNG unless you are doing compressed DNG wich can save you a LOT of drive space.

Also, you can now select a "fast load" option when converting to DNG. This makes the load time in LR a little faster.