De Telegraaf is now reporting wake turbulence as a possible cause:
'Ander toestel mogelijk oorzaak crash' - Binnenland - Telegraaf.nl [24 uur actueel, ook mobiel] [binnenland]
My Dutch is probably horrible here as it's derived from German, but to approximately translate the headline
"The crash of a Turkish passenger plane at Schipol was possibly caused by another plane that landed at the airport shortly before. The short distance between the airplanes unfortunately meant extra turbulence for the Turkish aircraft, so reports the Turkish pilot's union TALPA on Friday."
Hope that was close.
-drl