I think it is a little early for your post.
The USPS is well known for taking their time.

Work, vacations, sickness, etc could prolong the Thank You's.
Andy sent out my chips with his. I doubt most even realized I was involved. Thats OK too, I'm in for next year or even next month.

BTW, I am still waiting for a thank you from my niece for her Xmas check, the 1st one I sent in 1998, I've sent 5 more since that 1st one.
I'll keep sending them and some day I will get a big surprise Thank you.

I personally never expect a thank you so I am never disapointed. On the other hand I do get many and am pleased to get them.

Just remember, if you get a Thank You, you have to send a Thank You for the Thank you, you got.
Geez, that could go on forever, I'll just save time and enjoy being a part of a good bunch of people.