This is just speculation, but I think the reason it's taking JWT so long is simply because up until recently N1 cams where easily available for much less then what they would charge for their cams, thus no one would be wiling to pay $200-300 extra just for a 1 horse power more. Now that N1 cams are becoming harder to get it makes more sense for them to introduce a better cam.
I still think Turbo cam would be the best, VE's only have one Turbo cam option, VET cams, and those are hard to come about (took me months to find a set). Plus they are plauged with SR16 small low lobes.