I don't understand why you use short TTLs. Do you care that every visitor has to wait an extra 100ms or so to see the page they came for? I personally want all my DNS records at the ISP.
Sure, Google can get away with a 600 second TTL because there is so much traffic that only one person in a million will have to wait.
Sure, Google can get away with a 600 second TTL because there is so much traffic that only one person in a million will have to wait.