[altun]

It is too early to happy. I think the reason of dart popularity in the last month is Dart WM 2017.

Source: https://www.google.com/trends/explore?date=today%2012-m&q=da...

[filiph]

TIOBE methodology uses [<language> programming] as the search term, exactly for this reason. So Dart WM will not move the needle there.