And nearly all of them were shocked to find they were more accurate on everything with no instruments than they were with them available.
Im not going to argue with an ex instructor but I dont fully understand how a pilot could say hold 1000ft in the circuit more accurately without an altimeter than with one and the same applies to say holding 70kts as an example over the threshold. I know there are a lot of old school pilots who subscribe to seat of the pants flying but I personally dont see how it could be more accurate then when flying on instruments, in fact again in my humble opinion I would say its simply not possible.