Among the worst of these past few bad months. What I have found (all this time) is similar to what Paul2k described to me: You can try a trade, and wait, and wait, and try again, etc. When a trade finally goes through, and you get confirmation, it's like you now have the server's 'attention' -- you can typically make any number of subsequent trades, with no trouble. But, if you go away and come back, you're back to the same frustrating routine.
Several hours after reset, trades usually fly through, like they should.