I hate bad analogies that have us arguing more about how well the analogy fits than simply debating the underlying question. When we talk about concurrency or the ability to make simple yet high-performing server apps, it's ridiculous to say Go is a bicycle compared to the motorcycle that is Java / C#.
User-space network driver? The benchmarks group Go closer to Rust with Java / C# way behind: https://github.com/ixy-languages/ixy-languages
This would be a very complex comparison and simple analogies do us a disservice. I think the author's blanket statement that Go is faster than Java / C# also seems too broad.