[eluser]toopay[/eluser]
I doubt you can found that definition on google, it is actually based by standard o'reily book (written by a veteran Flickr developer) which i read several years ago while i started my first "large" application. I believed starting discuss about that would be useful for developer at any level.
And please do not apologize for that, I'm really apreciated, you bring that issues/term of scalability into this thread, because indeed it is the reason we should be when we talk about ORM, even you deliver it with your (standard sarcastic and provocated ;-) ) style.