I was intrigued by this statement by @DanWilson on Twitter:
All Web Developers: Never Ever Ever put anything after the password box and before submit button on a form. Tab MUST go directly to submit.
When I asked for clarification, he added:
because the UI pattern is Username TAB Password TAB Enter Key.
Can anyone point me to evidence that corroborates or contradicts that claim, even if it's anecdotal?