The Comg stuff is irrelevant. The original claim was that it preorders being low is just a stupid excuse because "not many people preorder today anymore" or whatever. That's a stupid claim to make because when they say preorders are too low, they don't mean that they have a preorder expectation, rather that because preorders still serve as a major factor in retail shipments being agreed on, the demand is not high enough for them to make an initial shipment they're happy with, so they're delaying the release to market the game more.
Unless you really think that companies and retailers are stupid, the fact that preorders have gone down over the years (if this is even true) is unimportant because such trends would already be taken into account by retailers who are the ones making the orders that determine how much the publisher can ship into the retail channel.
