I would say the Company boots are more like the slingshot driver boots... this said without having put them on, but i have seen them personally.
The plate system on the SS and Co, boots is AWESOME! i am working on a video describing EVERY idea and suggestion for the SS Driver Boots but youtube keeps giving me errors. I explain the plate's on-the-fly stance adjuster. i think i will have to remake the video in another format and try again. There should be a video on youtube from Slingshot themselves that describe the plate.
as for flex. i would agree with jeremy above. as for me i think flex is here to stay, but i don't think it is here to dominate or take-over. There is a reason more and more flexboards and flexboard and hybrid-flexboard companies are coming out (ie. Company, humanoid, Sine, LF's line, etc.)