It never went away.
However, on topic, this is has gone beyond 'ridiculous', straight past 'sublime' and made a hard left at 'downright frustrating'.
For as long as I can remember now, the day after maintenance has been riddled with lag for me, to a greater or lesser extent. Today, however, I had to navigate past a "server busy" message just to get it, one of the people I invited to my adventure I had rtf since just before maintenance last night got the same when accepting the invite and had to relog in order to make a kill, and now the person I sent some cookies to for use on my island and I both got it during the process of buffing me.
I dread to think what next Tuesday is going to be like. I guess I'll be battening down the hatches all over my island on Monday night.