I like to think that I am quite skilled at detecting this type of issue. Now that I think about it, this might be related to my pun skills. Being able to decipher more than one meaning is critical for doing both.

not very. i keep having edit my posts here because of it.

How good are you at detecting where the typo is in a message? Where the omission, or addition, of one word; changes what the whole sentence would seem to mean?

idk about words but extra punctuation can help with readability.