I saw freeper Buckhead's post last night. TankerKC had an earlier post.
Then, this morning,
powerlineblog.com started the cascade around 7:50 a.m.
The powerlineblog.com mentions
Buckhead's post #47 right in the first entry in that blog topic.
After powerlineblog.com started it, it was like an avalanche starting with a small snowball rolling down the mountain.