As far as I've seen google DNS respects TTL completely. Even if they didn't, it would be very uncommon for any DNS provider to force TTL over 60 (one minute).

As far as I've seen google DNS respects TTL completely. Even if they didn't, it would be very uncommon for any DNS provider to force TTL over 60 (one minute). Even if you found a large resolver that was really screwing you by doing something like setting TTL to 86400, you could just custom serve them a large EDNS response including all of your POPs in a round robin list.