I very much disagree that a) Twitter is only cutting dead weight and b) Tweeps are happy about seeing their peers fired en masse.
Don't be so sure, you're a high performer. High performance isn't just about your own performance. All it takes is for the project you're working on to end up on the dead end list and all the sudden, you'll be on the dead end list too. There's too many factors that influence a person's performance besides just the work they put in.
My guess is 6 months from now the company will be stronger than ever with an inspired staff that trusts their peers are pulling weight too.
Ah yes, the "inspiration" from solving the world's biggest problems of letting people send deep thoughts two sentences at a time.