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How is Google is wasting your bandwidth? They are just wasting (a tiny bit) of their own bandwidth.

I have no idea what he's getting so worked up about - a free CDN doesn't work exactly as he expects? But still works - and offloads some work from his servers ...

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Google is wasting bandwidth on the client side not the server side. He means millions of people are downloading jquery over and over instead of pulling it from their browser cache because of the messed-up expire header.

When you are optimizing your website, 60k is a lot, especially when this gets re downloaded on every page.

Client side optimizing is a big thing, by using CSS/JS compression, CSS sprites or late loading through stuff such as labjs you are talking about relatively tiny pieces. But you can feel this extra latency and it will show in your conversion and bounce rates.

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