For those who have VDSL2 (FTTC) installed already and have seen the speeds drop off as more people upgrade in an area (this drop off is often the result of crosstalk) then news of the vectoring trials expanding will be welcome. We understand that Openreach is to start enabling vectoring on more DSLAMs as of February 2015 with the aim of having 100 cabinets running in vector mode by the end of March 2015.
The cabinets involved will be spread across the UK, and we presume would be picked to give a sample of the varying cable densities and lengths that different areas will have.
The trials will closely monitor the speeds that people receive, but it is possible that some people who have seen speeds drop from 74 Mbps to 62 Mbps might see that loss totally recovered, the effect of vectoring is generally thought to be less for longer lines, but for those just under the 24 Mbps mark at say 21 Mbps the improvements might just boost speeds enough to earn a superfast label. The 1 to 2% who have line lengths to their cabinet of over 1500m are likely to see minimal improvements, but predictions are much harder for these lines, hence trials to help Openreach understand real world performance.