thanks everyone's input!!!
for June filers, it takes around 3-6 weeks to get receipts. be patient.
see attached updated excel file (148 records so far).
it looks Delievery Date around 6/15 get receipts around 6/11 got finger print notice...
if you don't have ID in MITBBS, you can input info here WXC and I will update the excel file.
http://www.*****/article_t/Immigration/23416906.html