I would expect that the price has been locked in from the importers down to the dealers, but would also expect to see any that make the shelves to be priced higher than the pre-order price. I've paid up front for pre-orders on a bunch of different items over the years, usually to secure a good price, or to guarantee getting the product when it arrives. Not sure how it's greasy when it's offered here.
As for the weight, longer slide, longer dustcover and longer barrel. There's your weight. As for it's suitability for IDPA, I can tell you that there was exactly zero concern or thoughts given on it's suitability for IDPA during it's design and development. This gun is built for IPSC and possible LE/Mil issue (and yes there are some agencies looking at it already, the same ones who issue Shadows currently), although LEO/Mil didn't really enter into it's design parameters in any meaningful way.