[jfoster]

It's akin to typing and having the characters appear out of order, isn't it? Are those particular keys more difficult to process?

[efreak]

Only if each key has its own function to process that keystroke, and some keystrokes had to do more processing and thus take more time about it. Selecting an item in a list view is a fast, simple process; what happens after that isn't up to the list view anymore.