Well I can believe it. Last Saturday morning, which was grey and on the cool side, I chatted to an older German couple who were on their way up the Watkin Path, he in a short-sleeved summer shirt, she with a lightweight windcheater, and both carrying tiny little rucksacks that couldn't possibly have contained any extra clothing. But the man had done it before, he assured me.
Best sight of all, however, was a seriously overweight man with a pregnancy-sized gut, walking poles but no rucksack - and a fag in his mouth!