RC, I don't understand how this would help because there's no saying how long it'd take the ramp agent to retreive the bag (even though it's probably packed in last) from the cargo hold and walk it up the steps to the jetway... If you're sitting in F, then you have to wait, what, five minutes? I've never tried this myself, but it does sound like a good idea only if it doesn't incur that much of a wait, especially with a tight connection...

aloha