not referring to anyone on here, but there are cases - such as Richard Lane, president of DUK - who has what is termed 'brittle' diabetes - meaning he can swing from 25 down to the 2s in a matter of minutes. i would imagine he is getting through more than 15 strips a day to ensure he knows what his levels are doing.
DSNs vary, there are some excellent ones, and some not so excellent ones. i wouldn't be happy to hear from any healthcare professional that i should test 4 times a day - what is happening to my body in between? if you are lucky enough to have levels that remain stable for those long periods in between tests, then i envy you. mine are prone to swinging in either direction, which means i have to test regularly to make sure they're not misbehaving, and to catch them out when they are.