In reply to icnoble: I think overall the all the grades are correct on the longer routes (i.e. main wall, triple over hang and the leaning wall on the left.), although the purple 6c on the triple over hang is a bit harsh.
The lower graded leads and top ropes seem to be inconsistent. For example, the 3xgrade 4 routes on the short vertical lead wall near the triple over hang are pretty harsh for their grade.
It's shame they don't do what Alien Rock does with their new routes, i.e. they have a white board with the list of new routes in one column, and across the top of the board they have the range of grades (e.g. 3 - 8) when people have climbed the new route you put a tick in the box you think the grade is, after a week has past the grade with the most ticks = the grade of the climb... Just an idea?