I was a little leary of the site at first. In the center of the page was a scrolling section of EHR vendors which included the big boys and it looked like it might be another advertisement. I went to the ACP website and was referred back to this site.
I then completed the registration (which included address and telephone number) although nothing really that private. I did note on their privacy policy that they are out of Vancouver, BC. Insteresting, since the Canadians have a different health care system, but it must have been more affordable, ACP is on hard times

When I went to the rankings, out 12 catagories of AC was first in 5 and ranked high in the others with the exception of billing (no surprise.)
Medent, one I was not familiar, scored first in 5 catagories and Greenway and Centricity (interfaces) each scored one.
The rankings seemed good, almost too good (AC was first in training, support experience, implementation experience, population management and purchase experience.) Overall satifaction it was second to Medent.
Given the intial shock of the "slickness" of the website, I was not expecting, despite what you had said, we would be treated that fairly, but WOW.