It is not normal to do a quick speed check on a smooth surface and have 2 wheels flat spot. I've talked to someone at DLX about this and they do not 100% guarantee that you cannot flat spot an F4, but flatspot resistance is a selling point of the formula and every case is different. In my case the shop knew the street and knew that I'm not going mach 69 and doing a speed check on rust belt asphalt.
The shop owner was the one that informed me of that policy. I was going to keep riding them honestly. Thought it was bad luck or I was an idiot. DLX seemed to agree that a wheel that is that new shouldn't flat. A 6 month old set? Probably not, that's egregious.