I am having the same problem but with the admin, even as I type this to submit an article it has been running for almost 15 min now “Loading..” it is dog slow.
I am using 2.6.2 with my own dedicated servers, the servers are very fast due to the nature of our main site which handle thousands of requests per second. hence it is definitely not a server issue or amount of content issue.
god knows what it is though, but certainly a royal pain in the rear end.
I have now finished typing this, which has taken a good 3 min, and guess what. Admin is still loading sending my article.
