I hear this more often and it is somewhat misleading. That sentence seems to imply node.js is better in terms of I/O throughput compared to other technologies,

I hear this more often and it is somewhat misleading. That sentence seems to imply node.js is better in terms of I/O throughput compared to other technologies, as if it's a trade off. This is incorrect and it would be more accurate to say "Good enough when your bottleneck is I/O, not good when your bottleneck is CPU.".