Well, for what it's worth I just ordered some faceplates from Control and got them in maybe just slightly over a week?
I am more generally finding, like others in the US, that USPS is pretty slow lately, though I've been fortunate enough not to have the epic waits some are reporting above. I order at least something or other weekly for eurorack, be it from Perfect Circuit, Control, Reverb, or elsewhere, and haven't had a waiting time of more than maybe two weeks on anything from within the US.
I always ship my own Reverb sales via UPS. Maybe I should emphasize that in my listings more, since it's an extra cost that I eat and it seems to be more reliable. Which definitely isn't to say that UPS never has delays or issues of their own, but I feel like it's a better option, and the UPS store by me is much less unpleasant to stop in at than the local post office.
As for ordering from outside the US though, you're lucky if you can get around USPS. The costs to ship internationally via UPS are way over the top. I assume that's true with FedEx as well.