Let me copy+paste part of one of the comments to clarify high numbers of WTFs in Obj-C from the article, from Sammy Larbi:
For Objective C, I have some light to shed on that situation. If you look at the search results for WTF and Objective C (through github's search), you'll see there are a lot of references to Webkit, which has the Web Template Framework, which gets abbreviated to WTF namespace in the code. ( I learned that from http://stackoverflow.com/questions/834179/wtf-is-wtf-in-webk... )
For Objective C, I have some light to shed on that situation. If you look at the search results for WTF and Objective C (through github's search), you'll see there are a lot of references to Webkit, which has the Web Template Framework, which gets abbreviated to WTF namespace in the code. ( I learned that from http://stackoverflow.com/questions/834179/wtf-is-wtf-in-webk... )