I tweeted a picture from the newspaper advert that reveals it is the half way house, if memory s working DC-HSDPA is an up to 42 Mbps technology, so clearly superfast NOT ultrafast
In the US my friends, family and work colleagues on Verizon's 4G LTE get speeds between 6 and 12 megabit. Given Verizon's CDMA 3G was limited at a usable max of 1megabit, they're quite impressed. Some people on AT&T LTE have seen 30megabit+ but I'm wondering if they were the only people in the area.
(The CDMA networks in the US had to roll out 4G LTE, as the CDMA 3G had hit the buffers on performance, and its likely they are carefully managing traffic/budgets and will increase speeds over time).
Contrast with Three's HSPA+ service giving 7 to 10megabit generally, and their claimed DC-HSPA when it launches potentially getting upto 20meg. Three's 4G LTE will need to get 30meg+ to be worth switching.
EE's LTE is as shown by the BBC videos running at peaks of 30meg but average around 10meg - I can get 18megabit on my EE (T-mobile tarrif) 3G connection *today* (with 3megabit upload).
Vodafone manages 7meg on a good day in the town centre - but generally struggles to hit 1meg everywhere else. O2 is pretty much capped at 1meg on phone tarrifs. (I've seen 4meg on an iPad). These guys could just hit 10meg on 4G LTE and amaze their customers who haven't seen.
It will all depend on the backhaul capacity per mast and number of simultaneous users - rather like comparing TalkTalk at peak times to Sky or BT. Lots to wait and see.
James BT Infinity 2 19/09/2012 - Estimate 44.6/6.5 - Install 52/12 - Actual 46 / 8 Mbps
Huawei VDSL -> Draytek router -> Apple Airport Extreme -> Belkin Switch -> Windows/Mac/Linux/NAS/Phone
13 years of broadband - 1999 ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(19M/16M)/BT FTTC(46M)