I do have same problem. I have been waiting for minutes before it was done.
Did the results indicate that your site was exceptionally slow or did you just have to wait a while to get the results of your test?
If you test from Dulles, VA you will get the fastest turn-around on your tests since we have several computers to do the testing. All of the other locations only have a single test machine and you need to wait for the test(s) ahead of you to complete before your test is run so it can sometimes take a while.
If the results indicated that your site was slow (which is what the thread you replied to was seeing) then you’ll need to share a link to your test results if you’d like feedback on how to improve it.