I am definitely lesser in the running domain, while I was not implying the intellectual or moral or any other domain. If you belong to the small group of world-class runners, then you deserve kudos. However, your reply would still miss the main point, as I (and likely other people who read this thread) am interested in what training Farah has done to improve his speed so dramatically, rather than in my supposed problems.
Thanks, this is an interesting topic. If the secret really lies in the underwater treadmill, maybe in the near future we will see this equipment spreading to many other training facilities. If I understood your point, the effect of this special treadmill is mediated by the higher running volume it enables. That is, it allows the athlete to run more miles and increase endurance so the athlete is fresher at the end of the race and can kick like a beast? If it were so, Farah would not have become literally 'faster', but simply 'fresher' at the end.