[points]

"Firstly that often results in horrid UX experiences, as Google Instant is"

Am I the only one that loves the UI for Google Instant and thinks it's the single biggest time saver of recent times?

[aik]

I completely agree with you. Today I found myself using a search in another tool and sat there for a moment after I typed, waiting for the results to come in. Once I realized the results weren't going to come until I press enter, I found myself a very tiny bit frustrated that I had to exert additional effort for me to see results.

[vessenes]

Nope, I love it. Makes it faster, so it makes it better. (And I'm a fast typist already).