Well, maybe he hasn't heard them.
About your concern with added latency in the system - why does that matter? Will you be using them to monitor your real-time playing of virtual instruments? That might be a concern if you're talking about 10 ms or greater, but today's DSP is very fast. I've never had a "digital" speaker in here to measure so I don't really know what it's like, but I've measured input-to-output latency of the DSP monitor mixer of under 0.5 ms in Focusrite's mid-range Scarlett series interfaces. I'm very congnizant of comb filtering of my voice when I'm listening to myself over headphones when going through a delayed path, and I wasn't bothered at all when monitoring through a Scarlett's mixer. If you're really concerned, e-mail PreSonus and ask if they have a measurement. It's easy to measure if you can get inside the box.
The digital processing is part of the design of that speaker. Not only do they do frequency equalization, but they also use frequency-selective delays for time alignment over a wider bandwidth than by just mechanical alignment of the drivers. PreSonus' consultant on the design of those speakers, Dave Gunness, has a lot of experience in using DSP for speaker alignment and correction. Look up http://fulcrum-acoustic.com
But really, in the end it's all about the sound, and that means different things to different people. I would expect them to sound more "modern" than Altec 604s, but (as far as I know) PreSonus has not dropped them from their studio monitor line since releasing a new series with the accordion pleated ribbon tweeters. When I asked which one I'd prefer, the difference was described to me as that the Sceptre was more "traditional" and the new R series was more contemporary. Whatever that means.