With regard to the above named article I thought I’d submit a theory. I cannot, sadly, verify this in its entirety but I think it has a ring of truth to it.
A friend of mine has a degree in Brewing and Distilling. When I was bleating about a hangover one day, he quoth, “hair of the dog” to which I scoffed a little, mainly because I was in no position to keep anything beyond dry toast in my stomach. Despite my fragility, he launched into the chemistry of the myth.
He believed that the severity of a hangover boiled down to the types of alcohol in a given beverage and the quantities thereof. Reputedly there are different types, such as methanol, phenol and ethanol. Each, he said, had a different molecular length, and your body turns to the most complicated or lengthy first. Ethanol is among the more complex, but wood alcohol, methanol, is one that makes you feel grotty. Hence - top up your ethanol, buy a little more time to get water and salts into your body.
Any possibility there is truth in this?
ETA: Link to column http://www.straightdope.com/columns/read/487/how-can-i-avoid-a-holiday-hangover --Rico