What I'm wondering is whether people are including phone screens and introductions as interview rounds. I'm going through the process now and with those I'll probably have 7 if I get an offer, but without it's more like 4 (online assessment, in person whiteboard, system design, behavioral). I haven't interviewed in 7 years prior to this, so I'm out of the loop with what's standard.
I do count the initial call if its screening in nature (usually is, its just automatic if you are an experienced dev). But compared to what you listed, I see 3 coding (including "tech screen"), 1 behavioral, and 1 architectural. Based on about 10 companies I interviewed with last month.