Just another experience here: called Costco today to fix some citizenship problems with our online check-in. When I called this morning and put in my information, I was greeted with an automatic response: "We're currently experiencing heavier than usual call volume, and cannot take your call at this time". About 20 minutes later, trying on and off during that time, I finally got through to the queue and was told my expected wait time was "more than one hour". Sure enough, an hour and a half later, I finally got through to a Costco rep, told her my problem, and was told to wait on hold while she reached out to Disney.
This is the part I was most nervous about: the wait time for Costco to get in touch with DCL. So, I was shocked when, 10 minutes later, my Costco rep returned and informed me that she had talked to DCL and resolved my issue. This inadvertently brought up another issue, which resulted in the three of us all getting on the call together (Costco, DCL, and myself), and that issue was then resolved quickly.
I know dealing with Costco has been a pain for a lot of us, but in this situation... I feel like I might have dodged a 500-minute wait time bullet? I'm not sure if this is a one-off thing or what, but I'll take what I can get! Now I'm just excited to have everything ready to go for our cruise! Finally!
tl;dr 1 hour 30 minute wait for Costco, then 10 minute wait for Costco to get to someone at DCL. Much better than I was anticipating.