Really? You've managed to mention the lack of generics on a thread announcing moving go to github? Is this a parody comment or are you serious?
All: predictable flamewars add no new information, therefore have a signal/noise ratio of zero, and therefore are off topic for Hacker News.
Except for multiple return values, easy concurrency, implicit interfaces, real value types, pointers, functions as first class types, closures, no inheritance, no exceptions.... but yeah, other than that, they're totally similar languages.
In C#, before generics, wiring up a typed collection/enumerable was seriously painful.