Two days ago, I reported on some people reporting seeing foggy or filmy Google results.
I finally have a picture, provided by Noisette, a top contributor in the forums. The issue is, from what I understand, is on slow connections, with Google Instant, Google is slower to show the search result predictions than on a fast connection. This appears to be a slowness impacting the AJAX.
Here is an animated picture of the issue, where you search for something and then a few seconds later the results clear up. To see the animation, click on the image to open in a new window:
I can see how this can be annoying.
Forum discussion at Google Web Search Help.