I can confirm that the speed increase is probably going to happen. I am a virgin media technician and wanted to shed some light on the situation.
1. Super Hubs. These are the only hubs we will be fitting from now on. The older grey hubs have now been scrapped.
2. The speed increases will not affect utilisation. It is the upstream QAM that gets affected by the utilisation so increasing speeds wont make a difference as the bandwidth itself is already there for the customers already on the UBR so chill!
3. However anyone changing from a DOCSIS 1 modem or hub will add to utilisation. OK feel free to flame again!
4. There has been heavy segmentation going on around the whole country which consists of laying another 3 fibres for each 1 fibre already in the ground quadrupling the capacity. There are less people suffering from high utilisation than you think. There are loads of people that claim to be suffering from utilisation but are just going from other forum members comments or speculation. A technician can tell you if you suffer from high utilisation and also the first/second line support.
5. Every Friday the company release 'Pitstop' which is like an e'zine telling us about all of the goals, common faults and fixes and any important news we need to be aware of and it was sort of confirmed by Neil Berkett in a video on today's pitstop. He didn't say about the increase but he implied it and said he would announce to us soon
Hope this clears things up