1) The background feature can not be removed today. This is more than likely for one day only - they are trying to bring attention to everyone that there is a new background image option. People are ticked because Google didn't provide the option to go back to the classic white view (you can select a white background, but all the links have a drop shadow making them hard to read, and the google logo is a cut out image that doesn't look right).
2) The background image is slowing the page down. For typical users this may not be a big issue, but anybody on low bandwidth is feeling it today.
3) The background image makes the page feel more cluttered. One of the reasons Google is so popular is because it's a big empty page with one search field on it. It's dumb downed and easy to use.
What's your opinion?
