It seems that Google Go would suit scaling issues that are mainly due to application execution (CPU) bottlenecks, so not disk or network performance bottlenecks which are actually more common. Targeting those who’d have to otherwise program in C means that Google expects a niche market for this language. Companies like Facebook and Twitter may have good use cases, but those don’t look to be the best of friends with Google nowadays. Would traditional enterprise development groups rush to adopt Google Go? I doubt it.