Like the rest of the social networks that have survived, Twitter has changed, both in response to user and commercial demands. The user interface, application ecosystem, geographical distribution, and culture not what they were in 2010, let alone 2006.
The report offer useful insights like”
The average active user tweets about 20 times per month. That number grew a lot from (roughly) 2009 to early 2012, but then it leveled off and began to fall.
Retweeting is up; replying is down. Retweets became more frequent than replies in late 2013. (Oh, and “old-style” retweets are dead.)