I see that the top of 2-10 person teams list at the moment, is a courier company. I wonder if they've got all their working cycle couriers putting their mileage on there? Currently, if they've got the maximum number of people on their team (ie 10), then they're probably doing over 40 miles a day each, on average!
I think last year I did a couple of hundred miles a week on average, which is still only about 30 miles a day (that was with at least one long ride each weekend, I think the DunRun was one weekend, and there was probably the odd WARTY and FNRttC).