A recent seminar I attended showed that (in very round figures) a 1900 era home could store about 500 gallons of water within its building envelope before reaching a point at which mold growth would begin. A 1960 era home with wood studs can store about 50 gallons. A modern, tight, steel-frame home can store about 5 gallons before reaching the same point.
Given the inevitability of leaks at some point, which home do you think is more likely to develop a mold problem?
It doesn't seem to make any difference as far as I can see; what counts is the excess moisture.
The less moisture a substance can absorb, the faster it will dry; what counts is finding infiltrated moisture and abating it before the insidious mold occurs (grows).
Take it from me, moisture storage capacity makes a difference, in a real building if not in a lab.
The books and websites I've mentioned above can do a better job of explaining why than I can in this somewhat constricted format.