It does for most using it, no idea why it doesn't for others.
see: angrymonkey, ronski, skyeci, longstaff, samwise78.
5 out of 6 listed as using the 8924 (including me) are showing correctly.
I don't think BCM modems give upstream attenuation over telnet on vdsl2. All the users on MDWS who show upstream attenuation are on ADSL. The exception is 1 vdsl2 user who is showing as using a Thom/Tech TG589vn v3.
There's 1 user, hypericum, listed as using a Billion 8800NL with 0 down attn but I'd throw a guess they simply haven't updated their modem on their MDWS profile.
It's hard to get exact figures as roughly 25% of users don't identify which modem they use.
I wonder if it might be firmware related? what firmware version are you using roseway?
edit: corrected incorrect auto-correct