Early Twitter investor Fred Wilson defends Dick Costolo in a tweetstorm

Twitter CEO Dick Costolo just announced he's stepping down from his role at the company.

Jack Dorsey, one of the original founders of the company, is stepping in as Twitter's interim CEO beginning July 1st.

Legendary venture capitalist and early Twitter investor Fred Wilson went on a brief tweetstorm just after the news broke.

Costolo's previous stock sales, the company's recent lackluster financial performance, and stalled user growth had some Wall Street insiders questioning Costolo's leadership abilities recently.

But Wilson, whose VC firm Union Square Ventures first invested in Twitter's $5 million Series A round in 2007, spoke out with some comments about Twitter's history. In a brief tweetstorm Thursday, he defended Costolo's leadership and the roles Twitter's cofounders had in building the company.

"The story when a CEO transition happens is always 'she or he didn't do a good job,'" Wilson said. "I have found the opposite is mostly the case. Twitter is the perfect example of that."

We've embedded his tweets below.