it's horrible advice for anyone who doesn't race or have a need for an areo position. it will give her a lower more agressive position on the bike, which is nearly pointless if you're out riding for pleasure.

i flipped my stem only because i race and i needed to be lower when i'm riding on the brake hoods (because i always need to have my brakes handy in these races) and i'm in a more powerful position when sprinting from the drops. however, it's not ideal for a weekend ride for more than 30-40 miles - i'm simply too far forward and low to be comfortable for that long. so, since my racing season has ended guess what i'm doing? yep - flipping the stem back to it's higher position.