This is surprising to me, I was expecting the Bitcoin Lighting network to win, but unfortunately the Lighting network needs to open a channel and some procedures before the transfer and also not available in all bitcoin wallets so Dash coin won.
What a surprising result but considering the lightning network is still at its ongoing development, this result will be different in the future. I never thought they really do a speed test such this one, although the result is not that surprising, the test was satisfied a lot of questions on which of them have the fastest transaction ever.