Barry,
I've had four or five 10/10s on a friend's telecom site. The trouble is that I cannot take a screenshot to show you as he has moved away from adwords (some terms were £ 24.00 a click, seriously!).
Basically, it was for product specific pages (telecom equipment).
We took the product name / model number and built a landing page just for that (we are talking 200+ pages).
The title, description, internal links etc were also very specific. Only after that did we write the ads (four different ones), which were then split tested against each other. These were in Ad Groups of maybe two or three keyphrases only (not 400, Derek!).
To be honest, on something more general like a carpet cleaning page, 7 or 8 out of ten is pretty good. That will certainly keep your cost per click s down.
Hope that helps,
Garry