I guess it varies. I typically just look at average times, based on the data in the spreadsheet https://docs.google.com/spreadsheets/d/16cfQUVB3j56QktacolbsAxpNlOrvk2uFGZzm_ZFCnfg/edit#gid=1216032789. For instance, from the July tab, no one has received a test invite yet.
You might as well...