Let's be frank, a broadwell upgrade would only be 5-10% faster anyway. I don't see how it would be a disaster for sales if Intel hasn't released new chips. I would like to think someone buying a $1300 laptop would be a bit more informed when it comes to tech.
Are you sure that people who buy Macbooks are informed? Considering that the majority of retina displays are unevenly tinted and only a tiny portion of consumers is aware of the issue, I tend to disagree with you.