I recently (within the past 4 months) received back both a Form 4 and Form 1. Both took right at about 8 months to process. That was using a Revocable Living Trust to do the transaction through.
8-9 months sounds like the time it is or will take right now. Guess I will find out shortly as I am doing another Form 1 item and will be sending it off within the next week or two.
I think the issue is a lot of these tax stamp requests are being submitted, and there are not enough people to process them. No "sinister" reason behind them taking so long, just typical .gov bureaucracy.
NRA & NAHC Life Member