Its called I know its the truth. Don't believe me, send her a PM.
This will get long, but if ya want details....
For both servers(menu and buffet) they greet the tables just the same.
The menu server grabs a drink order, and goes to get it. He drops off the drinks, and answers any questions about the menu. He then takes the order, and enters it into the computer. If there is an app, he has about 6-8 minutes to kill until thats ready. If not, he has about 15-20 to kill until the order is up. During this 6 or 20 minute time period he should probably take a glance at his table one for the 6 minute people, twice for the 15 minute people to see if they need drinks. They can easily ask a fellow server to do so while they chill out of view. If there is an app, drop it off, and then check back 2 minutes later to see how its tastes. Remove plates when done. Same for the meals. Drop them off, wait 2 minutes, and then ask how it tastes. Another glance halfway into the meal to see if refills are needed. Remove any finishes plates as needed. Once most are done, ask about desert. If so, go get it, if not, drop off the check. You have to keep in mind, he is probably going though this same routine with 2-3 other tables, all at different paces. One is getting sat, one is getting their meal, one is waiting for desert, and one is waiting to pay.
The buffet server explains how the buffet is laid out, where certain things are, etc. He gets a drink order, and goes to get it. He drops off the drink, probably to an empty table. He stops by a minute later to make sure they all found some yummy food. A couple minutes later he stops by again(maybe just walking by) and removes any plates if necessary. This happens many times over. He asks how the salad was, how the meat tastes, if they liked the soup, how the cake was, etc. You know, basic small talk. Drinks are refilled as needed. He drops the check off when needed. Remember, the buffet server has this routine going on at 3-4 other tables as well. One table might be waiting to be greeted, one has dirty salad plates to be removed, one is waiting on refills to wash down a spicy sauce, one is waiting on clean spoons for desert, and one is waiting to pay.
Basically both servers make the same circle, from the drink area, to their tables, to the dish area, and repeat. The slight difference is the menu server has to swing by the kitchen(normally right next to the dish area) to check on the app/meal/desert. Most restaurant have food runner, so if a server is greeting a new tables, while another tables app is ready,the food runner takes it out. The menu server has the advantage here. They know the meal isn't out yet, so they don't have to worry about the guest needing new napkins/forks/steak sauce. At buffet server, at just one table, can have all their people eating at difference paces. Mom wants another side of a special dressing not on the buffet, dad needs steak sauce, and littly jimmy is already on desert and needs a new spoon.
A buffet server removes 3 plates, just as a menu server removes 3 plates. They are equal in that sense. From what I've seen/heard, disney is getting away from having bussers. Both types of server have to clear the table, wipe it down, and reset it.
If there are bussers(for either type of server) the server tips them out pretty well. If the server made $150 in tips, maybe $30-40 for the busser. Both servers also have to tip out their bartender.
Yes, both servers get 18%. How much the server really gets is all a matter of if they have a busser, food runner(for menu restaurants), and a bartender. I'm sure it could go both ways. I know Ohanas is one of the few places that has bussers. Those servers are tipping out a decent chuck to the busser, and then also some to the bartender.
Any other questions, just ask.
Um, what? More chairs means more work no matter it buffet or menu.