I think they are a new strong market to consider - the problem they have with a community like TPF is that many here are more early in their photography hobby, so they are still collecting/building their working DSLR setup of 1.6 or fullframe (or further) cameras and lenses. There are not a few, like myself, who see the micro 4/3rd Hybrids as a great walk around camera for the DSLR shooter who wants a smaller, point and shoot like camera without losing the versatility nor quality that they are used to with DSLR.
As such on forums where there is a larger older population of photographers who have already spent their money investing in their DSLR setups there are many more m4/3rds users because they've the disposable income to put into the system (since a good m4/3rds system is probably going to run £1000-2000 easily for a complete setup).