It's not just you. If you read it carefully you'll notice that the evaluation only shows that the improvements are that TCP retransmits are reduced from 4 to 2

It's not just you. If you read it carefully you'll notice that the evaluation only shows that the improvements are that TCP retransmits are reduced from 4 to 2 per second, which probably has no impact. And that the latency is only better in a contrived example with iperf and ping. The paper really demonstrates no tangible benefit.