Hi,
FBW aircraft is significantly less the number of earlier crashes caused by pilot error
I dunno to what FBW aircraft statistics you take reference ... but for the Airbus FBW serie .. all important accidents were the cause of pilots errors (and some human errors associated) ..... never the aircraft (system or engines or structural) was plain implied in the cause of accidents.
And it's seem's that the AF447 (and the Libyan A330) accident will be added to this list
In fact .. so far .. after read all BEA or NTSB or other reports about Airbus accidents .. the aircraft was always working fine (minus the Sully one and the Qantas A380...) .. the pilots .. no.
Globally today the statistics shown that 75-80 % accidents are caused by pilot errors .....
That's normal that the balance change (more accidents cause pilot errors ) .. as the technology (engines and systems and structures) are more reliable today