I'm writing this while DPP processes a batch of files. I've always shot .jpg only because of the outrageously large size of RAW files.
Well, because I know I'm very much an amateur (even if my family won't believe me)purchased larger memory cards and brought along a netbook, to dump to, when I shot my sister's wedding this past Saturday. I can not describe the power shooting raw gives you after the fact to correct things such as color balance. Also the styles feature my XSi has and I've never tried to use can be done after the fact with nice results.