Mark CMG
Creative Mountain Games
I'd rather it be a bit more fine-tuned than that, in that I often give out half-XP or even quarter-XP for a given encounter to characters whose participation was peripheral at best, and none at all to those who did nothing and-or were off elsewhere.
Giving XP to the whole group as SOP just over-rewards those players who have their characters hang back all the time and let others take the risk.
Lanefan
And it can be fine-tuned, as you say, by the individual GM/group to account for your personal tastes. A GM can, for instance, tie events to individuals and have PCs of the same group all receive one completed Event for a particular battle (or half an Event if so desired) while gaining another (or another half) for personal RPing goals related to a particular encounter. A bard might need to also gain some important historical info, a priest some artifact being held by those encountered, while a warrior might gain by making sure the group takes less than a particular threshold of losses. Much more flexibility and easily allows for RPing goals and combat goals to be integrated simultaneously.