Eurogamer has reviewed Braid and given it a score of 10/10, saying:

Braid has filled my head with so many ideas, so many opinions, so many emotions that wrestling them all into a coherent critique is like trying to strangle a swan made of jelly.

And then also:

Braid is beautiful, entertaining and inspiring. It stretches both intellect and emotion, and these elements dovetail beautifully rather than chafing against each other. Still wondering if games can be art? Here's your answer.

Impressive. Not the only review like that. It's live on XBLA now, allegedly.

(Copied verbatim except for that last line from Braid.)