Yeah I've no idea how Twitter works or what kind of fires they have to put out on a day-to-day basis, or what other things grow - so I wouldn't dare to make any rash predictions like that. My thinking is that even if Twitter had double the headcount they needed, it'd be really tough to axe that many people without firing or turn away the people needed to put out those fires.

And yeah if you weren't a Twitter user before, you're probably not signing up at this moment in time :)