From what I've heard and seen on Wiki +3 Haste is the most you can get.... all that aside this is also the best belt I've seen. All my belts always suck, i've gotten HP+12 ACC+5 DEF:+2 before and HP-6 DEF:+4 Haste+2. Everything else I've gotten has been total suck; sometimes even 3 negative augments or something like VIT-2 ;; so grats on this belt :)
Yeah, probably the best I have had drop (it's my pic). I got two due to having 4 C.C, and the second was VIT+2, Acc+3. Apparently you can have up to +4 STR, +6 Acc and 4% Haste ... imagine that one!
Not sure if completion time is a factor in the quality of the augments, or it's just Chaperix' level and job on defeating the boss.