Perry Bible Fellowship

No, it's not wrong, it's just that a century ago some prescriptivist cunt put together an arbitrary set of rules in a book and called it "proper" English, and ever since every teacher assumed that the book is the only correct form.

To be technical, he should have said something like “even I’m impressed with your skills.” I don’t think anyone really cares in modern language though. It’s a lot more noticeable with phrases like “Where is he at?”

Almost everyone uses them. I guess it’s not “proper”, but unless someone is an English academic, no one knows or cares. Sometimes, using a preposition at the end of a sentence can make it feel awkward or clumsy, though.