If OlusNet is doing that then I think they are insane. Long line users need all the help they can get and ADSL2 has a number of performance improvements such as single bit constellations ie one bit per tone not a minimum of two. There are a number of other things in the standard which I forget. ADSL2 offers G.INP, which no one implements per-se, but I do now enjoy the Broadcom proprietary equivalent PhyR. PhyR seems to have been a really big deal for me, possibly being part of the recent improvements that have given me a much more stable connection in terms of SNRM fluctuations and connection up-time, and it has allowed reduced interleave depth, for people who care about such things.
I simply cannot for the life of me imagine how anyone could justify choosing G.992.1 over G.992.3. There is a reason why they did all that work and rightly called those developments improvements.