I searched for the page I referred to, which I saw about 2005, and found it was from 'firehouse.com'. Unfortunately the full article is now 'subscribers only' which is a pity as it contained comprehensive detail and pics. However I did find an online extract of it for you (first post, possibly what you've already seen?) which includes an interesting and self-evident picture
Saab92x.com / Saabaru B Pillars vs. the jaws of life
I think its introduction dates on 'certain model' Subarus back into MY2002, and is obviously the reason why they achieved those outstanding side-impact ratings