Thanks for the information on phasing. It confirmed my very limited understanding of the process: I didn't see how it was possible for Ancestry to do this with only our individual test results.
People who are getting lots of matches here seem to be those whose ancestors have been in the USA for many generations. I think that the results will improve when more people from other countries decide to/are allowed to take the test.
Heehee! We are all writing at the same time. :)