nope, the winners of the comp usually sort out the dealers tip.
yep.
No I wouldn't. If you only take home a bit everything you tip the dealer is a very big % of your profit.
If you in a decent amount I would tip (though it used to be tipping the valets as tipping dealers used to be ilegal) but it can't be a significant % of what I won as that would make it a very bad move for my bankroll.
I see people tipping dealers in a cashgame (in some places that's fairly comon as thecash game dealers are not proper dealers but just guys who volunteer) when they win a 10£ pot they throw the dealer a £1. That's 10% of the pot AFTER the rake/table cost per hour has already been taken. That's just stupid in my opinion which is why I wouldn't do it when a pot is that small.
I much prefer tipping a dealer in a cash game after a session rather than during one so that's what I do.
I only tip from decent pots.