Debris field size Explanations
There'd appear to be a lot of CNN and "expert" agonizing over the apparent size of the objects constituting the satellite imagery of the possible debris field SE of the MAS370 track. Apart from it conceivably being a partially deflated/inflated escape slide, it could also be a concoction of wreckage linked by wiring looms. You only need a few wiring looms to remain partly intact and interweaved to keep a debris field together in one clump.
The flotation could be explained by the characteristics of the new insulation that replaced metallized mylar (MPET). There's quite a lot of it and it'd be capable of keeping lighter debris on the surface. And of course there'd be a lot of water white-foaming around any such debris and thus enhancing its apparent size in an image.