Does Twitter make people half-witted?

[Vinni and beer]

I have an account that follows entertainers and authors that I like
In the last month I have found out about free gigs (Comedy night at the camden head)
low price gigs (another comedy night at the pleasance theatre)
New tickets becoming available for shows which have sold out (Derren Brown)

as well as links to interesting articles, new facts (eg @whatifnumbers - @HistOpinion)

I also follow the rail company, which I use to commute - which has occasionally saved me some stress.

anyone who thinks twitter is all about somebody tweeting what they had for lunch is seriously misinformed and if you have that prejudice, you're probably a bit half-witted yourself