Reports coming in from all over the grid... Tuesday Aug 19 evening, asset servers are extremely slow. Items aren't rezzing. Avatars aren't wearing. This is the case even on "fast" sims. Notecard contents aren't appearing. Items showing up as "not in database" then appearing on subsequent tries.
My guess: SL internal systems communications are majorly borked. Which would also explain why sculpties and textures are loading so slowly, why group chat and group notecards aren't working right, and why general lag persists. This isn't customer computer issues. It's not the internet. It's Second Life.