Sure look real.
http://www.lemmetweetthatforyou.com/
You know - instead of just talking about fake tweets - you could just go make your own.
https://www.youtube.com/watch?v=M3w5EgzuFf8
Here is an example of not just a fake tweet, but some kid hacking an actual twitter account and making a post.
The fake twitters have different fonts than the actual twitter accounts (like the Amanda - Cruz “Grease” lyrics which is a fake.
The twitter account hacking as shown in the above youtube - that’s scary!