Dealer can definitely matter in my opinion. My dealer I’ve bought 4 from, 3 in the last 10 days, gets the job done very quickly as far is their part in the process. They contact me as soon as it’s approved and have everything ready when I arrive. One was approved kinda late Tuesday night. Wednesday morning the gun shop contacted me about an hour before they opened saying it was approved and they’d have it ready as soon as I could get it.
I bought one suppressor from another local gun shop and they took forever, told me I had to come in person to certify, then gave me some BS story about them having to do all of this paperwork before I could pick it up after it was approved.
The last three I just bought were in stock so that definitely shortens the time. But the dealer definitely can make a difference in wait times also if they dint do their part in a timely manner. All three were bought and submitted without me ever going in to the store.