As mactec54 comments that is not terribly unusual but it is a good demonstration of what can be done with modern tooling. My guess is that it is a TiAlN coated tool, these can give awesome performance when cutting with a powerful air blast. If you look carefully the chips appear to be coming off a bluish color. Under these cutting conditions most of the heat generated in the cutting remains in the chip; there is simply not enough time for much heat to transfer by conduction to the tool or workpiece. Because the chip gets so hot at actually loses hardness so the cutting load can be less than occurs when the cutter is running slower. The big problem with running like this is if you do overdo it or let the tool get dull things go downhill in a big way very quickly.
An open mind is a virtue...so long as all the common sense has not leaked out.