I agree with the previous posters, it is an estimate that is often conservative. However, be warned that there are rare cases where people get much less than the estimate. Even where they have estimated nearly 80, BT only assure you 12.

Also, don't forget that there are many others who will offer the same FTTC service as well as BT retail's Infinity. They all use the same underlying BT Openreach FTTC infrastructure, with their own internet infrastructure.

BT advertising is rather misleading in a couple of ways. They imply without saying it that Infinity is a unique product. They say that their router is really wonderful at wireless connection, where it is really an up to date but low end product adequate for many but very far from many better products.

Sky, PlusNet (a BT owned company), John Lewis (who use PlusNet infrastructure) are the commonest at the consumer level. Many others (Zen, etc) offer higher levels of service (though probably the same FTTC raw speeds) at much higher prices. See https://spreadsheets0.google.com/pub?hl=en&hl=en&key.... That said, for me and for many who don't need fast p2p, BT Infinity ends up as the most cost effective choice.

CAP/BCAP/ASA rules, nothing at all to do with Ofcom

The BCAP Code is drawn up and published by the Broadcast Committee of Advertising Practice Ltd (BCAP) and is generally interpreted and enforced by the Advertising Standards Authority (Broadcast) Ltd (ASA).

This arrangement whereby duties allocated by Parliament to Ofcom are carried out by BCAP and ASA has been effected through a procedure of contracting out of Ofcoms statutory duties to regulate broadcast advertising.

However, not all aspects of advertising regulation have been contracted by Ofcom to BCAP and ASA.

In reply to a post by dm1983:

It says when infinity is available for me at the end of September it should be:

66.3Mb download
20.0Mb upload

I take it that is not an "up to" claim like most other speeds then seeing as it doesn't say that?

I think even when 'shaped' during peak times on P2P it would still be faster than your current connection.
If it is an issue use a VPN service to avoid shaping.