When I was in college one of our teachers worked with us to show the differences in different optical systems. He expected us to be able to tell apart a Canon digital photo and a Canon digital photo taken with a Yashica lens, then the same photo and lens but with a Nikon. We got to know the qualities of the different cameras and lenses kind of the way people get to know film, which is kind of why he showed us that because he also worked with us in the first year black and white photography class to tell apart different films. Now I know someone here is going to get all huffy and puffy about how its impossible to tell apart these things and so on but....too bad.
And what I mean by heavy handed adjustments are things like color and tones and sharpness are so heavily influenced by the camera and baked into the raw photos that its was difficult to work with for us. We have a very well laid down work flow going on here and the G1 kind of screws with the entire process. I have talked with two different imaging experts about this and they both come to the same conclusion that there is some pretty influential software stuff going on, not to say there isnt with every digital camera you use but the G1's is a lot stronger then say a Canon 5D. If you still dont believe do look at this:
http://www.flickr.com/photos/avotius/3311871154/
Now dont get me wrong here, the G1 is a great camera if you got it for what it is, but it ended up not fitting into my processes and what I thought I wanted it for so I sold it, that's all!