I have 8 players, and I am notoriously cheap on xp (like 5-10% compared to standard). I also use geometric xp tables from the Wilderlands players guide. Advancement is every 8-10 sessions. I have the players vote for MVP and #2 MVP. MVP gets a 200 xp bonus, and 2nd gets a 100 xp bonus. Works out to about a 15-20% bonus for the session. I find it works quite well too...folks try to play as a team.
My regular xp is as follows:
CR x 100xp/players each, half if not killed, 1/4 if PCs run away, 1/2 for traps. No xp for monsters of CR <3 less than the PCs, unless "in bulk".
Each Wilderness Hex or dungeon room explored-5 xp each PC
Minor plot theme deciphered/uncovered, solving riddle/puzzle etc. 50-100 each, like finding the dungeon entrance or solving the mathmatical puzzle
Major of same--150-500 each, like killing the BEBG after several sessions, rescuing the princess, etc.
Good/Creative idea (like tactics etc. that are really smart, e.g surprise me) 25 individual xp
Good roleplay--25-100/session each.
This works out to between 500 and 1500 xp/session typically. I do not escalate for PCs being higher levels...except CR factors go up. Makes for a good 1E level of advancement, and player skill grows at the same rate as character skill...I mean these guys are good.
28 sessions later, the survivors (4/8) are 3rd level, and the rest are levels 1-2 (depending on when they died). I think they have 4 permanent magic items (a +1 ghost touch axe, an amulet of protection from petrification, a minor robe of blending, and an amulet of +2 hide/move silently). They also have accumulated several potions and scrolls. Oh, and I charge 10x the xp for magic item creation.