Rincewind81: This is just putting one and one together. It is about money...
And when we talk about money. The usual share between the developer and the store is 70:30. So GOG will take the same share. If they compensate every european buyer who pays 26% more than an american this will be a heavy impact. They did this for Age of Wonders because they need to react quickly, they do this with the Witcher because they get all the money and can afford it, but that is it. Regional pricing for now is pretty dead, so the delay instead. Most of the games are sold right at release and in the weeks after that. And Larian will get the most out of every buyer. And after that GOG can sell the game "fair priced" for less...
This is unlikely as big an issue as you think. With the compensation games costing GOG about 70% of the compensated games, the regional profit they get from the EU version vs having sold it in $'s already covers most of the games compensation. At best they make a tiny loss. And that is only for the compensated sales. The non-compensated sales will still make them 30% profit per copy.
Considering Steam's sales stats are about 40% US, 40% EU, 20% rest, and that GOG would have a similar share the profits from the US sales of the game still makes them easy profit on the game.