Not really. They were buying $120,000 per day of an in-app sales. DS was the only OMGPOP hit; had they not succeed financially with DS, Zynga wouldn't have had bought them.
I bet they could have bought the team much more cheaply a few months before Draw Something got popular. I wonder why they didn't...
Part of the acquisition's worth comes from cross-promoting other Zynga apps through Draw Something.
This was in part a talent acquisition but a huge part of the sales price was definitely for Draw Something. A more appropriate/typical TA price for OMG would have been in the tens of millions.