From the FAI web site, clear indications that EC has applied for the record as stated in their press release. This surely means they did it, one cannot imagine any company setting themselves up for such a fall (unlike WMD claims!).
Make no bones about it, this is a major accomplishment, far beyond what anyone has done. It is clear that the aircraft was over stressed (in a manner of speaking) and it was not a "serial" aircraft from that respect. In other words, if I go 20% over gross weight, or 20% beyond published torque limits, I can't claim it was done with a "normal" aircraft. NASCAR fans understant this well, and won't try to go 200 mph because a "stock" car did so at Daytona.
This is the snatch from the FAI website for news of pending records:
Sub-class : E-1 (Helicopters)
Category : General
Group 2 : turbine
Highest take-off : 8 850 m
Date of flight: 14/05/2005
Pilot: Didier DELSALLE (France)
Course/place: Mount Everest (Nepal)
Rotorcraft:
Eurocopter AS 350 B3
File not yet received | Database ID 11596
http://records.fai.org/rotorcraft/pending.asp