I don't know what article you are reading, but the one provided by the LINK reads EXACTLY THE OPPOSITE.
"According to gastroenterologists, carbohydrates such as sugars, starches and fibers produce the most gas in the colon, as they do not get absorbed as completely in the small intestine. This is why vegans and vegetarians tend to be more flatulent than their meat-eating counterparts."
In 8th grade, Joey Luciano told us about lighting his farts. He told us to “watch this”, whiich is the predecessor of , “hold muh beer”.
Out came the matches, down went the pants, match lit, placed close to tush, fart let go, blast of flame and tush burns. Off to the hospital.
To this day we call him the original “Flaming A$$hole.”
The two ideas are not necessarily contradictory. It is likely vegetarians produce more gas and meat-eaters produce more potent gas.