Too often people just hate change even if it improves things. With Prefix it seems every change we've ever made with the site was met with a good deal of complaints but almost of them improved the site. 

 Zuck has not done what we would have done: Written a hasty and intemperate note telling them to STFU.

Instead, Mark (or his handlers), have written an earnest if overlong letter to his flock, counseling patience, and pleading for understanding but reminding them that Facebook is in fact a business and not their personal sandbox. The money grafs:

We realize that change can be difficult though. Many people disliked News Feed at first because it changed their home page and how they shared information. Now it's one of the most important parts of Facebook. We think the new design can have the same effect.

...It's tempting to say that we should just support both designs, but this isn't as simple as it sounds. Supporting two versions is a huge amount of work for our small team, and it would mean that going forward we would have to build everything twice. If we did that then neither version would get our full attention.

Really, remarkable restraint. We're impressed. Of course, we do have one complaint: Terrible title.

http://www.alleyinsider.com/2008/9/mark-zuckerberg-to-facebook-redesign-complainers-get-over-it