Understandable concerns. We don't call out competitors specifically but you can probably guess who we are benchmarking against. I did the one we describe in the blog post myself with our toughest competitor in Shenzhen, it's real I assure you.
I've run hundreds of low volume orders on conventional lines, it's death by a thousand cuts, tough to describe exactly why until you do it.
In Guangdong standard turnarounds 2020-2022 were 1-2 days (unpopulated) and 3-4 days (fully populated) outside of holiday periods or special cases (>4 layers; exotic substrates; oddball components; custom through-hole soldering). Faster was available for extra money. I'm sure it's accelerated since then. About 9 calendar days international delivery from China is often achieved these days as noted by others and myself.