I necessarily don’t agree with the assessment; the blog link is from a content distribution firm and hence, they have a lot at stake for “pushing out influencers”. However, it is subtly directed at those cherry picking “stats” from papers as “Tweetorials”. No, you cannot learn from confirmation biases!
The first tweet is the most important part of any tweetstorm because it is your tweetstorm’s elevator pitch:
It’s the first part of your tweetstorm that people see in their feeds.
It’s the hook that pulls them into the rest of the tweets.
It’s the part of your tweetstorm people are (usually) most likely to retweet.