I've worked 10 years in various dining establishments. My experience is that if your server is rushing you in any way, than they don't need the money.
I did work for a certain 24 hour establishment recently and their policy was to bring out the main course, check back with the table after the first bite to ensure everything was ok, then drop the check, adding, "I'll gladly take your dessert order when you decide."... The dessert menu's were part of the table set up, so no menu had to be brought.
The theory in this is that our chain is known for it's affordability, people may not have enough money to buy dessert! Giving them their check in advance allows them to check the tab regarding financial situation. I know this is seedy and poor buisness ettiquete, but, when your target customers are seniors who are living on a budget, it's a nice gesture.
Regarding breaks, if a server is required to take a break, and has management pressure, than typically you check the table one more time, explain you'll be on break for "x" amount of time, should the customer wish to leave or need anything, server "so-andso" will be available and happy to assit. Then the check is handed over to the other server. As far as the tipping goes in this situation, it's circumstantial, sometimes they split it, sometimes they don't, severs don't tend to steal from one another though, it's a close knit bond and in that buisness if you screw with one you have the whole army to contend with.
If a server is rushing you, give them the evil eye, facial expressions are taken very seriously by the good server and problem should right itself, if not, well, your the one who's paying the tip, and don't be afraid to tip appropriatly.