In terms of their ability to show the GP opinions/perceptions of things(more especially artists)?
When i look at it ,it seems as though people who post are just posting to artist mostly to get their attention.They either post very nice things or very mean things.Most of them also just bandwargon a
particular tweet and re-tweet it because it seems really smart or gets them more attention(in other words it wasn't really something they thought of, they are just doing it to be cool and trendy).
And when you look at it if artists such as we have seen with Gaga look more to their twitter mentions and take them seriously the only thing they will be looking at is either "Lady Gaga is the Queen of pop/other form of delusional praise" and "she's so pretentious/some other mean comment".This will probably affect them badly if they took them seriously.
So do you think people give twitter too much power than it has to show the GP opinions on artists?