Not sure if 100% of their posts are mind blowing. It's hard to dispense much business wisdom via a Twitter feed. Still, you can learn a lot from them, especially if you follow the links they recommend. My favourite is at the top:

David S. Rose @davidsrose Venture capitalist, entrepreneur, angel investor

Jeff Bussgang @bussgang Former entrepreneur turned VC at Flybridge Capital

Fred Wilson @fredwilson I am a VC

I'd also suggest to read through David Rose's replies on Quora. Very thoughtful