I can't say I'm seeing that precise pattern - and even in the "Swapasaurus" article, his second example doesn't quite match that pattern either.
However, I really wonder if he's on the right track about this being the new normal, rather than a long algorithm update. Algorithms don't usually take this long to roll out - am I correct?
Some possibilities:
- The local algorithm is now more reliant on signals that vary considerably from day to day
- The local algorithm is running a lot more extreme tests
- It's not an update at all, it's something going haywire in Google's infrastructure. (Though if that were the case, you'd think they'd have fixed it by now.)
I might be way off base here, but it's worth considering.