This is how slow they are when shooting RAF:
S2 Pro - click....... (wait about 6 seconds) before the image appears on the LCD.
S3 Pro - click....... (wait about 4 seconds) before the image appears on the LCD.
When shooting JPEG, both about the same.
actually i thought it was JPEG that took about 4 secs on the S3 Pro. for RAF it was like 1 sec.