Quotewhy shoot sRaw? just shoot raw and downsize.. I never understood shooting at a quality less then your camera could provide..
Images would take up more space on memory cards, resulting in more memory card changes during a shoot. Images would take more time to download, then time spent downsampling and converting to a new file and erasing the original. Time is money...
Raw versus sRaw - This goes beyond just memory cards. How many harddrives can you afford if only shooting full sized Raw?
SRaw is fine for many purposes. I mean really, how many weddings or portrait shoots result in people wanting larger than a 20x30 print? Generally for non-art shoots, I go with sRaw on my 7D - and sometimes when i do shoot art i forget to switch back to full size RAW. I've done 20x30 prints from sRaw files, and they look pretty damn good!
I suspect that I take/keep as many pictures as most, and with the RAW file from a 7D, a $100 3TB drive that stores roughly 167,000 images will last me for awhile. And the $100 is pretty insignificant in terms of photography expenses.