Depends what your flavor is. All stainless rifles in 20B are running around the 15 month mark plus or minus a few months. If you want a 20B with just a stainless barrel six to eight months is what Rick told me. The 24B I don't know, I didn't ask, but I assume alot quicker.
When I ordered my phosphate 24B, I was told there was a 6 - 8 month wait, but it was closer to 3 months.
My educated guess is in addition to the SS actions being a long way out due to engineering challenges, the other limiting factor slowing up deliveries is the stock. Forbes was/is advertising barreled actions available for immediate delivery.
Has anyone received a 20B yet, in any flavor?