I just got back from a fairly low-key meet earlier today. In the 3000, there was talk about "breaking 11" from a few high school boys. They were all wearing Dragonflies with the exception of two of them, who were both wearing Vaporflies.
Seriously man, WTF? Superspikes aren't going to help much at that pace, and you're looking at maybe a 2-3 sec/mile advantage over trainers when you're going that slowly. You're better off increasing your mileage by 5 mpw instead.