Yep AFAIK it was correct... at least up until the ASSIA case late last year and uses the last known figures that were publicly available from BT.
Since then though they have been fiddling with some things. I doubt it would be the MTBE or MTBR, but the caveat is there that since said court case theyve kept very tight lipped about certain things :/
The only ISPs that have outright said which profiles they use are
Speed: Plusnet, Zen and probably AAISP
Standard: Is the default profile and thanks to jid we know that TT definitely use this.
BT is a bit fuzzy. Supposedly Standard, but seen rumours on their own forums that this can be changed by EU request.