Brian,
that statement you quote is by Peter Grey the article's author - not Bob Spaulding. Where Peter got that information is anyone's guess. Clearly, in that article he is 'selling' the aircraft (as he tends to do in most of his 'flight tests'.)
I agree that HC's comments are somewhat emotive, and do not wish to become embroiled in a transtlantic and north/south hemisphere spat. However, I can say that HC is absolutely correct in his assertion that the MGB does not have a run dry capability. I'm not going to mention sources, but rest assured those sources are as 'horse's mouth' as it is possible to be.
Let's get away from debating if it's true or not.