surely its just the single pivot in one of its many forms as someone pointed out above? You cant argue that a linkage driven shock is any fundamentaly different to their original ones, specialized are on about their 4th or 5th generation of FSR bikes (a single rigid strut from the horst link to the shock behind seatpost was the original design, then it gained an extra link betweent the seatstay and link behind the seatpost, then the shock moved under the seatpost on the original enduro where it stayed for a while, then there was the epic which was a bit of a dead end in evolution terms, then it went lower with the demo, enduro and SX, before the link undergoing a massive revision to become a type 1 lever from a type 3, then finaly we've ended up with a type 3 lever in the same position the 3rd generation had the shock. Its hardly been consistent has it?
Whats the difference between a lawill design and an FSR? Same number of parts and pivots, in similar places?
p.s. Kona never copied the D.T. design, kona's interpretations were single pivots, the turners were horst links, kona (allong with alomst everyone else) raced them from about 94 onwards with the misser brothers.