We got rejected by YC and I am just guessing the reasons. Thinking that all founder aren't ready to move to SV for three months and also few are not ready to leave their full time job...etc... but still it is just guessing game... hey could you tell PG to tell everyone about reason for rejection ;)
Few people might not able to digest the reason..but all are not same...many can take that as a advise and that could help in future..