Twitter is all about brand, brand, brand, well at least one fifth of it is, according to a new study in the States.

According to Jim Jansen of Penn State university, he and Twitter chief scientist Abdur Chowdhury looked at half a million tweets to find that 20% of them were apparently people "asking and providing" product information.

That means one in five of your tweets are about you praising or moaning about products, company's and general brand recognition.

Do you talk about brands on Twitter? Let us know in the comments below.