This is the common "wisdom", which tends to make me skeptical.
But I do agree in the following sense. Once customers form opinions of a product and its pricing, those opinions tend to change relatively slowly. So managing expectations around pricing at launch is important.
There are many ways to tweak pricing expectations. Off the top of my head, some include: (a) "pre launch" pricing (used by Emery); (b) offering a family of products or modules or whatever, each of which is priced separately, implying that major additions will be an additional cost; (c) varying support levels; (d) varying usage levels; (e) extras such as security & encryption that enterprises will pay for; ...