Different Int types in SQL Server

I was just catching up with mails and newsletters that had filled my inbox during my recent travel.

This article on the different Int types in SQL Sever caught my eye.

The most surprising part of the whole article is on that there is near enough no performance difference between these type, if you ignore the network. With storage being so cheap now, it usually is of negligible importance to save on storage space, but the no performance impact part was unexpected.