No that's exactly what I mean: I expect the round-trip within a datacenter to take roughly 0.5ms, I expect the key lookup to take about that time or less, so 10

No that's exactly what I mean: I expect the round-trip within a datacenter to take roughly 0.5ms, I expect the key lookup to take about that time or less, so 10ms is roughly an order of magnitude more than I would expect a "simple key-value query" to take