Small amendment to my praise.
I will say, first, that I have a really poor an slow ISP connection. There is no move forward on this, except to outlay a large amount of money on the only alternative in my country abode, on fibernet.
Having put that out of the way. I am having big delays and hang ups when using any internet facilities in build 056. On this machine, I have, currently, 9926 and Windows 8.1 installed in a triple boot. Neither of these are giving me connection problems.
I visited the insider feedback and found I was far from alone. No idea at this stage what the problem is, but I am confident that MS will solve it before a stable release comes along.
I suspect it could be linked to the automatic update, which is exceptionally slow on this build, blocking the whole OS.