Same problem here Nick. I had this problem before the site upgrade, but after the upgrade I thought it was resolved as the forum was super snappy. However over this past weekend I have been experiencing the issue again. For example to reply with this post it took ~45sec to open the 'reply' dialogue. It does not matter whether at home or the office or which browser (I use both FF and Chrome). No idea why this happens, but I also open topics in new tabs so I can keep reading while things load.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1