RAE
Thinks s/he gets paid by the post
That is true. The particular yeast strain used by A-B produces a relatively high amount of acetaldehyde compared to most brewers' yeasts. That isn't well tolerated by about 7% of the general population, which is why many people say Budweiser (and its derivatives) gives them a headache.
I guess I am one of the 7% - cannot drink Budweiser. Between the foul taste and the certain headache to follow, I will never touch the stuff again. Doesn't matter, though, I have a zillion much better craft brews to choose from...........