A couple of road tests suggest 75, but what would you expect from a low revving, long stroke single that makes around 18hp at the back wheel ? More important for many would be it's near constant torque production & ability to keep up with traffic in an un-flusterd way which the road tests suggest that it does well. And the balance shaft keeps it smooth at higher speeds acording to the road tests.
In reality it isn't that much higher output than the older models, but is engineered to allow what performance it has to be used to the full - that they seem to be selling well in all markets that have been released in so far suggests that what they offer (and for the price being asked) there is a ready supply of customers. 3 Year unlimited mileage warranty suggests that RE have confidence in their product - how many other sub-£4K bikes come with such a warranty ?
There is more to life than "top speed" and many more bikes that will go faster if that is what you want - this would appear not to be the bike for you. Why so negative all the time ?