I noticed a slowdown well before the long weekend and it continues today. When I go to a forum, I open threads that seem interesting in new tabs. Typically, I might open 5-12 tabs, depending on the forum and other factors. It used to be that the last tab would be loaded by the time I marked the forum as read and went to the last tab. Now (including in the past ten minutes), multiple tabs will still be loading. This has been consistent for over two weeks. (Above, I estimated three weeks, give or take one.)