[bb101]

I've noticed this for years, and always wondered "Why?" myself. Then I came across a UX blog where the author suggested doing exactly this. Their reasoning being that new users aren't familiar with your website, so they need a big garish button to help them sign up easily, whereas regular users are familiar with your website already so they will know where the Login link resides.

I don't agree with it personally, I think it reflects an organization where marketing is prioritised over customer happiness.