Couple things:

1. I could post the raw data, I've held back doing so because it is quite expensive to collect and organize and I'm hesitant to give it away for free.

2. I agree that this data may skew toward companies with a great deal of hype, there is more data I look forward to collecting down the road to produce a more complete picture. Employee count is quite meaningful for B2B companies, and because B2B companies are not ranked against B2C companies their respective Twitter followers do have some meaning. If you build a "boring" B2B business and it is doing well on social media, you probably have a pretty strong brand.