I bought the Nebula 30x product and got my results quite quickly, in under three months. It's hard to tell if my experience is better than average or not, given that people tend not to speak up about services when they're delivered on time. There may be some issues with the data quality. I happened to post about it a couple of hours ago: https://www.reddit.com/r/Nebulagenomics/comments/w8013t/rate...
My current best guess is that more data than usual were of bacterial origin, but I'll have to learn a bit more bioinformatics to test that.