So long as there's no knock, no one is revving so high as to cause valve float, and there are clear safe max values to avoid piston to valve contact, at worst they'll see no gains and at best they'll see all the gains I've been hoping for.
I'm hoping they can also confirm or refute whether the Nismo ECU's have same or different VVEL target maps as compared to non-Nismo. I've been clinging to the hypothesis that they are different for ages now with no clear answers...
EDIT: nope, apparently same VVEL -- I stand corrected
ECU ; stock ECU Vs Nismo ECU difference