Wow the fact that you are going to test prototypes so we can make and informed decision is really clever and helpful zefir! It's nice to see that you have the back of those who ordered chips from you. Nicely done.
Generally, with the portion of reserved chips I plan to supply all Open Source projects that offer manufacturing services with chips and ask to send me a fully functional prototype board for testing in return. I'll post my test results to support people still indecisive which board to take.