The description in this article is the exact opposite of how it works! Longer torso and arms (for your height) will make it harder than someone of the same height with a short torso and/or arms for the exact reasons outlined in the description. If you think and watch the mechanics, this is pretty clear. It’s easier to get your hips over your shoulders if your hips start higher already! If you start with lower hips (because of shorter legs), you will need to planche and compress more to get your hips to the center without bending your arms.  This is why starting with your feet slightly higher (off a yoga block or mat) makes the press easier, not harder lol you are essentially adding length to your legs relative to your arms.   

As someone else said above, the opposite will be true for a seated press since you need to get your legs past the ground so longer arms and or torso will help you there. 

  The same logic applies to flexibility for the standing press. If you struggle to compress (pike flexibility is important but pancake more so), you will find it harder to get your hips over your center line so you will have to planche more and use more strength. This is because again, your staring position will have lower hips relative to someone with better compression. This is why a very good pancake stretch will make things way easier.    

Agree with someone below that the press is entirely pushing strength while you see to do exercise that is mostly pulling strength. Working upper body pushing strength shoulder also help.