Tom,
In the UK this isn't relevant in winter with short courses and temporary tees and greens.
In the main season however, I try to play from the competition tees whenever I'm allowed. At courses I go to this is mostly in the 6,100-6,500 range although I'm happier to go longer.
Most courses in the UK seem reluctant to allow casual golf from the competition tees, my home club is like this. Also, most UK courses don't like visitors using the competition tees. Some more enlightened courses take the opposite view however, which is nice, but tend to link it to a handicap limitation of some kind, which is I guess a bit more understandable when you take wear patterns, variable playing ability, speed of play etc into account.
As an aside, although I wouldn't necessarily be in favour of such a development, I can't help but wonder if we'll still be playing from grass tees at all in 10-20 yrs time or will it be synthetic tees pretty much everywhere by then?
Hope the survey goes well.
All the best.