People who say they iPad doesn't get uncomfortably hot are living in denial.
I've had a simliar experience with my iPad 3 so far. The heat isn't really an issue, but it is noticable. Perhaps some units have some misappiled thermal paste or something (I don't even know if there is any thermal paste on the processor in the iPad, that's just a complete guess).
Anyway, I like my iPad 3 but I still like my Mac (and Kindle) more.