4.3% hashrate is a good start, but if we add a Bitfury, thats another 7.9%. But the condition as far as I remember was that the Core devs must add the UASF code officially within the next Core release.

If we manage to get Bitfury on board then things get really serious because we enter the 10%+ zone.

Anything beyond 10% is interesting to see because snowball effect beggins.