In reply to Lord_ash2000: I really struggle to think of many occasions when I've actually seen people training on routes of 7b and up indoors. The only times that spring to mind were at the Foundry, the Edge and Kendall.
In my last two visits to Bristol I've been one of around 3-4 people climbing 7a+ but I can't recall seing anyone on anything harder. There are FIVE 7a+ routes there for comparison but Undercover rock is 50-100% larger.
Over two Winters of climbing at the Westway it was only about 1 visit in 3 when there was ever any climbers on the 7bs on the main overhang. Even there at one of the largest walls in the country there were very very few routes in the higher 7s.
I'm not sure where you climb, but quite frankly there just doesn't see to be the demand. Most of the good sport climbers I know seem to spend little time indoors and even when they do they boulder and campus much of the time.
I'd be interested in other views as to wether there is no demand from higher grade climbers so walls don't set the routes OR walls don't set the routes so higher grade climbers visit.
Other thoughts?