TSI Direct Forum Support is not aware of any email delay problems that may have been happening. I'm the only one who reported this problem. And of course, no delays are apparent today in my tests, or their own email test today.
Support suggested it might be a problem with the email clients I used (Outlook Express and Windows Live Mail). I didn't know using Outlook Express could cause the one copy of an email BCC'd to Hotmail to be delayed 22 hours, while the other BCC was delivered to Yahoo in seconds, and the TO recipient got his in seconds. And other emails (not from TSI) were getting through to Hotmail just fine during the delay period. Maybe I clicked on the wrong SEND button or something...
Oh well... just another little TSI email 'peculiarity'.
I'll be there soon, GMail!