During the GamerEscape interview with Yoshi he mentioned there will be at least two benchmarks.

The first benchmark is supposed to be a test version to be released before the Alpha testing starts. The second is a "maybe" before release.

Link: Summons, chocobos, train tracks and rocks.

Please, please, please! I want to drool over the smooth FPS and amazing detail while running it on my new GTX 680!