In a pre 1.0 language there will always be some things that are still waiting to be optimized. I saw some performance spec for one of their HTTP libraries awhile back and it was a lot faster than Ruby. It might have been faster than Go.
It does seem that immature languages tend to win a lot of benchmarks, likely because they're still cutting a lot of corners. Still, though.
I only wish they picked a more "Enterprise-friendly" name...