And when the BT home hub get's 802.11ac...
I bet it will still have a real throughput of around 24 Mbps.
Broadcom has provided more details on the 802.11ac Wi-Fi chips it will bring to production in the second half of this year. The Broadcom chips, announced in January, are initially being aimed at the early adopters in the carrier and enterprise industry, and will be ready for volume production in the second half of the year, …
May be the author of this article should do some further research on 802.11n first!
Beamforming, both explicit and implicit, exists even in the older 11n standard, it is not new.
In fact, Marvell and Atheros seem to have had it in their AP and client WiFi chips for at least 2 years.
Source:
http://www.marvell.com/wireless/avastar/88W8764/