I sent in my joycon to Nintendo for them to fix about 2 weeks ago, and got it back in the mail early this week. The turnaround was basically instant once it got to them, but then I only had 1 joycon to fix so it probably wasn't a big deal. It seems like they straight up replaced the entire joycon, but I was half-expecting them to only replace the analog stick. It's probably more efficient to just send out an entire replacement though, now that I think about it. Here's hoping my left joycon doesn't start getting drift also!