Yes, you are right. Windows Dial-Up Connection Status should show it, but he probably won't know where to look.
BTW: His ADSL2+ Attn. may only be 49 dB and he might get only 6 Meg; less than ADSL1/2.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU BB => 2010: Orange 16 Meg LLU BB