I'm not sure I see the connection between this article's arguments about rent control and efficient markets theory. Efficient markets are those that incorporate all available knowledge about goods into their prices. Rent control isn't a problem of price uncertainty and asymmetric information.

Maybe I'm missing something, but if I'm not, I think you're hurting your point by waving terminology like that around. By trying to discredit an unrelated concept from econ, it's like you're saying "if you can find an argument that doesn't rely on economics of any sort, feel free to bring itup".