As you go through the girl database, if you see a skinny Asian girl with big breasts, chances are very high that they have been enhanced. And heck, if you choose one and get one of those rare ones that Wander talks about that are big and real, you've found something many other mongers search for years without seeing
Bottom line: A lot of reports here will describe the girl's breasts as being enhanced or not. Various terms are used, such as bolt-on, inflatable, man-made, enhanced, and so on.
Gherk