So, 37K/32M = 0.00115625, or 0.1% of GoDaddy domains. Is that a trend?
I doubt it. SOPA protest transfers will most likely be a hiccup on their average in and out numbers over time.
Registrars that are touting special offers for entering a code with your transfer will be able to quantify on the receiving end. I'm sure they will bleat about the "victories," possibly sharing their aggregate in numbers with the out numbers, but I don't see that lasting for long once the offers of discounts start expiring.
One interesting play might be other registrars going into a cartel agreement on pricing against GD to force slimmer margins. I'm not sure if that's legal but it would be a more long lasting effect.
RE: Go Daddy loses over 37,000 domains due to SOPA stance | VentureBeat