I now have a very similar problem. I can connect to master server. I can pick a game server from the list and join. The connection window appears then the loading window. At this point, during the day (gmt London), usually nothing further happens, very occasionally I get through and the game completes its load but most of the time it just hangs. However. In the early morning hours (0500), I am able to load and join any game on the master server list.
I have changed absolutely nothing. In fact I was away on holiday over Christmas. Computer off and unplugged. The above problem has been with me since my return. Prior to my hols I was on multiplayer 3 or four times a week without a problem (I run a squad and have been flying this sim for years).
So has anything else changed? Well 127 was launched in my absence so this may be a factor. Virgin (my ISP(not fibre so usual copper wire speeds)) announced the introduction of new traffic management software designed to limit p to p during the day, so maybe that's it.
Other multiplayer games like ARMA and FSX work fine and all my network test show no change from the norm.
I could list all my equipment and drivers etc. but, as I have changed absolutely nothing, I see no point.
Any Ideas ED.
Javelin