Most folks probably know about the Pilot Survey commissioned by GAAC, being undertaken by a Ph.D student (Terry Lober) as part of his dissertation, and aimed at providing a better reference base for GAAC etc when negotiating with the various bodies affecting aviation.
But if you hadn't heard, and hadn't completed the survey yet, please do! The more inputs there are, the greater the validity of the output when it is used in our interests.
You can find it on the GAAC site at
http://www.gaac.co.uk/survey
And apologies if this has already been mentioned on PPRuNe (I've not seen it but I have been on holiday recently).
Keef