Harry Lime
Practitioner
It's hard to be believe that they would have some M9s ready for sale. Don't manufactures always announce new cameras way ahead of the actual release date?
I have a sneaking suspicion they started to work on the M9 the moment the M8 stumbled out of the door. They KNOW that the M8 was a stop gap measure. Just look at the inside of one. By German or Japanese standards it's a train wreck in there, but considering that they built it mostly from off the shelf parts, with no R&D budget and probably under huge time pressure it's an impressive achievement.
The M series is not a terribly complicated camera in comparison to your average DSLR.
Your main area of engineering is image capture and processing.
The RF unit is done and may be tweaked, but it's not like they have to redesign a sophisticated AF system.
The metering system is as simple as it comes and probably hasn't changed much since the M6. Same for the flash system.
The body is rather straight forward in comparison to a pro series DSLR.
I'm suspect that Leica has to do about 35-50% of the work that Canon or Nikon have to invest when they design something like the D700 or 5D-2.
They don't even have to worry about the sensor. They send Kodak a spec sheet and write a check.
So, yes I think it's very reasonable to assume that they could have designed the M9 in less than 2 years.