had mine in an
S5470 for over a year. Very happy with it for playing heavy metal/death metal and with the volume knob at 1 or 2, it's "blues-y". I think there are couple threads I posted/replied regarding the D-X
As to why there isn't much talk... maybe the dual-blade design doesn't appeal to certain people? maybe people already have D-Activator's but [insert random reason] to upgrade... maybe it's the most powerful pup in Dimarzio's catalog (much more so than an X2N!).
For what it's worth, the D-X is definitely an underdog that's not a one-trick-pony imo.
Reg