Here is the link for the saved chat between BT employees and consumers regarding the latest HH4.
I must warn you, you may be left disappointed with some of their answers.
I think the new HH4 is a great piece of kit, way better than the HH3 in every department. My consoles run smoother than ever before, my Speeds and Ping/Jitter are more stable and consistent, pages load faster. The only complaint I have is that nothing uses the new 5Ghz system, they all seem to want to use the old 2.4Ghz, so really I dont know why BT bothered with it, they should of worked more on the 2.4Ghz for better signals, speeds etc..
As far as I understand from earlier details, the H4 still only has 1 Gbit port. I honestly can't believe they went for that... That alone is already a no go for me to do a paid upgrade.
I gave up trying to read it. With no meaningful threading of questions and answers, it was impossible to work out who was answering who's questions.
I think I'll stick with my HH2 for the time being.
I did compile it a bit neater here - http://community.bt.com/t5/Other-BB-Queries/Ask-the-Experts-Hub-4/m-p/897656#M55352
edit. Oops, part watching a film and leaving these posts opened, without refreshing the page may cause a delayed response:D