Good point W&W, Inpex was spudding to 3500 mtrs TD and they still haven't finished 7 months, Tullow spudded to 5800 mtrs TD and it took 5 months+, Jaguar is spudding to 6200 mtrs TD estimated 6 month spud.
The only thing I can think of is they contracted a semi-sub rig instead of a jack up like Atwood Beacon and maybe it's capable of spudding quiker, still seems fast though to spud 4300 mtrs in 60 days.