quote  While smaller file size will write to the cards faster to the camera's

memory buffer Martin,  this does not mean the camera will be able
to capture more shots by speeding up the frame rate 

 
Martin says

"All other things being equal (unless I'm missing something), smaller file size
must mean faster possible frame rate."

The specs given by camera makers are the frame rates in Jpeg which are compressed I hardly see how a sRaw file will be quicker than the max frame rate quoted by the makers! 

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt