Keeping up with "jet speeds" always comes up when discussing pilots new to jets. That, too, is old news. Vref landing approach speeds on newly designed business jets are very low, often 110 knots or less, even on large jets such as the Gulfstream 550, so there is no extra speed to keep up with when compared to piston twins and turboprops. In fact, I have a hard time making myself slow down to the actual Vref in most business jets because they are so low I feel like I'm dawdling down the ILS. Approach speeds in the proposed mini jets will be even lower, maybe less than for some twin turboprops. And I don't see how the higher cruise speeds add anything to the challenge of flying a jet because the bad news is that the controllers usually tell you when to start down, and it's not often at the optimum point. In the terminal area, the mini jets will be happy flying at speeds typical of any propeller twin, so there just isn't an issue here.