Probably but not definitely.
The dates have a habit of slipping back so it might not happen then at all, and sometimes not every cabinet linked to the exchange gets converted on/before that date.
The only way to tell for sure is to check with the availability checker at
http://www.dslchecker.bt.com/adsl/adslchecker.welcome after the RFS date. Even that has been reported to not be 100% accurate, but you should get a full refund if you order and it turns out to not be available on your line.
--------------------------------------------------------
Current ISP: Andrews & Arnold (AAISP, aa.net.uk) via FTTC at ~36Mbit down & ~10Mbit up, joined July 2011.
Previous setup: Be Pro with UploadPlus (ADSL2+, AnnexM), 12ish Mbit down, 1.6 up, happy customer for ~2.5 years.