IO540 - There is no suggestion that pilots should not receive adequate training in the kit fitted to the aeroplane but this should be done as part of the TR course, not as a pre-requisite to it.
What is unreasonable is that these requirements have been applied to only one manufacturer's product and are not supported by JAR-FCL. You can get a type rating on a Raytheon SP jet without these restrictions but not on a Cessna one (similar restrictions have been placed on the CJ series).
Note that it doesn't say 'G1000 experience' it says 'knowledge', although there is no definition of what constitutes knowledge. I have several thousand hours experience in both SP and MP jet aeroplanes but have never seen a G1000 - according to this ill-thought edict by the JOEB, I cannot, therefore, commence a type rating course on this aeroplane.