True. I was having breakfast in one of the Wetherspoons in Exeter at 11:15 on a Saturday morning a few weeks ago (we were on a special event) and the place was already about 30-40% full of Wetherspoons' finest habitual drunkards. There was a table of three of them sitting not too far from us, eating fry-ups and drinking shorts. One of them must have been about 45-50, and he was shaking so badly he could barely co-ordinate his cutlery with the plate.
A chang soldier could have drank right through the night and then sat next to him, downing the same drinks while demonstrating apparent stamina/sobriety. Then cave in for a good 12 hours at some point in the mid-afternoon.
In all seriousness, I wouldn't like to get stuck heavily into either, which is why I don't. I barely even drink these days, don't take drugs and haven't smoked for over 10 years.