Pricing low has nothing to do with being rude. That statement is a major disconnect from reality.
I also think that there are many service out there that are buying into this 'high pricing' doctrine and are giving prospective customers sticker shock. These starving young companies can't afford to do that so early in the game.
The other day I saw a site on HN selling business ebooks to startups: "how to drive more traffic to your website" $99, a customer segmentation ebook for $39, a copywriting ebook for $49. All this stuff is way overpriced. Dozens of quality articles can be googled up in a few minutes for the same information. I know because I did just that.
The people that tell these young startups to jack their prices are not being helpful or even honest. Maybe its a way of trying to justify their own high pricing.
I suggest young startups get users by any means possible, even if it means discounting heavily. They need habitual users, and that requires making it affordable enough that the enduser uses the tool / service for a long enough time that it becomes a habit and the tool becomes too entrenched in their workflow.
If anything is rude, it's telling young startups how to price their businesses when it looks like they don't have a clue on pricing even their own.