we've moved servers to the US (previously the SQL data was hosted in Australia and the image server was in the US), which means there's more hops than there used to be with the old server.
ATM, we're hosting with EV1/theplanet, who are supposed to have one of the biggest backbones in the US, but it'll still be a tad delayed as the server's running at max load and because of the number of hops.