Is Pinterest THAT Mainstream Already?

An anecdotal story about how mainstream Pinterest is at the moment:

Four times since 2005, @U2 has conducted a massive survey of U2 fans around the world and we’re planning to do it again next month.

To get ready, the @U2 staff has been reviewing the 125 +/- questions that we typically ask — about 100 to 110 of them are the same each time, and the rest change depending on what’s going on with U2.

At some point along the way, we asked a couple questions about social media:

• Do you use Facebook?
• Do you use Twitter?
• Do you use MySpace?

The gang agreed that we don’t need to ask about MySpace this year — it’s just not relevant at this point.

The first suggested replacement question?

Do you use Pinterest?

That was suggested before “Do you use Google+?”

I know it’s not at all scientific, but it really struck me when my @U2 crew put Pinterest in with Facebook and Twitter as something we should be asking U2 fans around the world. Is it already that mainstream?