Notice that I used the term "shielded".
Yes, I noticed that. :-)
Please notice that W8JI states (at the first link) that "Folklore claims a small 'shielded' loop antenna behaves like an electrical sieve of sorts, sorting 'good magnetic signals' from 'bad electrical noise'. Nothing is further from the truth! At relatively small distances a small magnetic loop is more sensitive to electric fields than a small electric field probe."
Believe me, Tom knows exactly what he's talking about! I built such shielded loops from 1/2" hardline some years ago.