Good in what sense?
The noise margin is at the reccomended minimum level for a stable connection. Noise margin fluctuates a bit and and if it drops much below 6db your connection may well drop out. Your noise margin is quite low given your line attenuation and sync speed though - I can sync at 8096kb with a 9.8db noise margin on a line with 36db attenuation.
If it's stable, it's as quick as you're going to get on your line unless you can improve things by plugging directly into the master or test socket. If its not stable, you'll probably need to lower the sync speed a touch to bring the noise margin up so its above 6db all the time.