Today, I've been receiving receiving comment notification emails for the 29th of June. Got 3 of them so far.
That now reminds me of an email that was really delayed. Someone had sent me the email in December 2002 & I ended up receiving it somewhere in August/September 2003. Out of curiosity, for how long has your email been delayed?
Update, 16:48:12 IST : This note in Status specifies they've been clearing out email backlogs today....ah well.