I thought it was alright. My only problem with it, is why even bother with M.S. Paint, when he could have just used illustrator to vector it. No big differences in what he was really trying to achieve with the outcome; using curve tools, filling in simple shades, and....using curve tools(not trying to slight any vector users, by the way).
Now all of this initially said would be invalid if he didn't have some sort of high grade program like illustrator, or photoshop to achieve something like this, but after checking out his other works at his web site, it would be best to assume he has the proper tools to pull it off. Besides, I always thought pixel art was best described as the exact placement of pixels to create a piece, in which case, smaller pieces show execution the best in the majority of cases. In this case, it might be feasible to let it slide, but would be best to just move it to another genre of art: Vector.
Must have just been a show-off attempt to make others believe, "aww man, I can't even write out my own name in M.S. Paint, let alone draw a car! Awesome!!" Must be hard for me believe it, or maybe me just being a prick, but I use M.S. Paint and do not find this that entertaining. It's ok, but not great. I think he should try pulling for the name "Vector God" instead, and even so, he still wouldn't be better than some vector artists I've seen lately. But then again, it's just my opinion...