As the designer who worked on the main interface for Sublime Text 2, it does irk me that it looks so similar. They had carte blanche to create a wonderful new interface and they mostly just copied Sublime Text. The go-to anything menu looks especially similar. https://t.co/5YxVbZcVcK
The tabs are the thing that reminds me most of ST but they are practically just Chrome's tabs -- everything else isn't particularly distinctive and seems standard for a text editor.
But the very first thought is "wow, it's exactly the same look as Sublime Text", not JetBrains product, not Eclipse, not even Visual Studio, so they definitely were completely inspired by Sublime in particular.
True; but if you were making a text editor today, with the whole flat UI trend and minimalism being so prevalent, the sublime UI is actually very intuitive. It's just that sublime got to it first, in my opinion.