I have a post dissecting Onswipe's decision (you'll never see it), but my arguments and debate were trumped by market data released yesterday byComScore. This is a tracking service company, and they also analyze and sell the data.
For yesterday's press release comScore pulled together data from 13 countries on mobile devices using the internet. You can't rely on the data completely (it's not hard to fake your browser signature), but it does show some rather interesting details.
The iPad is currently the dominant tablet device in all countries being tracked, and it contributes more than 89% of tablet traffic. This is why Onswipe only supported the iPad, and it trumps my complaint about not supporting other tablets. It's like a I complained that there's only a Windows version of an app, but no OSX version.
Do you know all the tech bloggers who regard the tablet market as being the iPad and only the iPad? Look at the data i linked to above and you'll see that they're not wrong.
image by Mike McCaffrey