I would take what's said in that article with a healthy dose of skepticism. That is an article largely meant to justify the methods that RAM uses. There is some truth in what they say. But, they take it a bit too far.
I may be able to offer some "historical" insight about why the article was written and what they were trying to accomplish with it. Granted, this is total speculation on my part. But, I feel confident in my speculation.
My guess is that this article was written in response to criticism that a competing program (my company's RISAFloor) was throwing their way about the limitations of their DG-11 implementation. Specifically their inability to perform any calculations for bays "irregular" framing. They want to paint what we (and their users) were seeing as one of RAM's weaknesses into a strength. That way they could reduce the number of their users who were ditching RAM in favor of RISAFloor. As such, my belief is that this is article was written with a dual goal.... marketing and technical.
Now, there is some truth to what they say in that article. So, don't completely discount what is said. They make some valid technical points. It's just that those points should be that this weakness of RAM's is not as severe as it first appears. Not that it should be viewed as a "strength" of their program. Really, that's a pretty transparent indicator of the article veers away from the technical goal in order to achieve its marketing objectives.
My company had been hammering them pretty hard on their weaknesses related to "irregular" framing. So, I understand their desire to combat the narrative we were putting out. And, after having discussed the subject with Dr. Murray I understand where they were coming from with their implementation.
Note:
There was a previous Eng-Tips discussion between me and Dr. Murray on the subject of irregular bays and floor vibration. Eventually, we came to the conclusion that RAM's exclusion of irregular bays was NOT necessarily appropriate. And, that the procedures of Design Guide 11 can and should be used to determine vibration or frequency problems in irregular bays.
Specifically, we discussed the example shown in Design Guide 11 figure 7.2. Where the "irregular" bays in a floor system exhibited the most severe vibrational response on the floor level. Enough to warrant adding in additional columns to change the frequency of the irregular framing. This is a case where RAM's limitation would have ignored a bay because of "irregular" framing but where RISAfloor would have identified a vibration problem.