I pretty much explained the very concept you quoted. If you give up something somewhere, you have to make up for it somewhere else. In the example quoted, the slide will have a high initial velocity due to only one spring being compressed. What happens when the next spring engages? An abrupt change in spring resistance. The slide would be slowed abruptly which would increase the rearward force against the frame producing more rearward motion and hence increased recoil.
While it is possible that a human may percieve a high short impulse different than a lesser, linear impulse, that hasn't been substantiated as far as I know. But, this sort of thing generates all kinds of unsubstantiated hype that may not be true at all except in someone's mind.
Here's some actual indication from shooting from Jag45's post in this thread: "As for precived recoil, most thought that if there was only a difference it was only slightly different in the weak hand part of the course. I had fired a friends earlier, only a mag full at 15 yards, and really could not tell any difference."