Misspelled keywords

I read your article about use of misspelled keywords. Do you really think that works?

It’s important to note that some spelling mistakes occur on purpose, that is, they’re often based on the pronunciation of a word. Many of these, particularly those occurring in difficult names or locations, can be anticipated. Other times, particularly on the Internet, misspelling may results from the fact that people are typing and simply mistype. There are five common types of errors that people make while searching on the Internet:
Error #1: Additional Characters
Error #2: Missing Characters
Error #3: Typos
Error #4: Inverted Characters
Error #5: Substituted Characters
The Surgeon's Advisor Team