I think he also underestimates the fact that people wouldn't have bought it otherwise and if the game is of high quality they become a loyal fan to the dev.
This
But he is dang right with this:
"Step 3 - Having played Axiom Verge about 5 times now, I feel pretty confident that at $19.99 it's a bargain. (Again, biased!) In terms of price promotions, we haven't announced our plans yet, so I may as well do it here. Sony just announced that Axiom Verge will be part of the Spring Fever promotion. All titles in that promotion will be 10% off during their launch week for PlayStation Plus subscribers. I'm happy with this, because if there's anyone who deserves a price break, it's the most ardent fans who have been supporting us all along! But after that initial week, we will not be discounting Axiom Verge for at least 6 months after launch, meaning the first time it would ever be discounted will be October 2015. To be clear, we haven't decided if it will go on sale in October. We've just decided that it will not go on sale before then.
By announcing this, I'm hoping this accomplishes two things: First, I'm hoping that people will not feel like they're about to make a mistake if they pay full price. Second, I'm hoping that people who feel that $19.99 is too expensive can make a more informed judgment. If they're waiting for the price to go down to, say, $14.99, they can decide whether waiting 6 months is worth $5. To some it will be. To others it won't. And that's fine. I'd much rather people make informed decisions with as much transparency as possible than feel any buyer's remorse. Because we need our customers to feel good about what they're buying. We're all in this together."