Thanks for the heads up - I've run some diagnostics tonight and so far am not seeing anything particularly unusual on the server end. It may be some sort of network issue affecting only certain geographical regions. From here I'm not really noticing much or any slow down. We log how long it takes every puzzle page and every completion page to compile, and they're still compiling in good time (about 2-3 hundredths of a second).
I've opened a ticket with our server company to have them investigate in any event - maybe they'll have some ideas.