And no, I don't mean folks from Louisiana :)
While I appreciate much of the intended audience probably hikes in the continental climates of the northern hemishpere, it would be nice to explicitly state that "spring" or early season conditions also vary with hemisphere (eg spring is September 21-December 20 down-under). Hemisphere also affects route planning with regards to snow, damp and mud, as in the Southern hemsiphere you would choose to stick to northern slopes rather than southern slopes.
None of this helps when you have no land mass to buffer between you and the Antarctic, which means winter conditions can hit any time of year so you should always be prepared for four seasons in these parts. But all-in all that was an excellent article, and more along the lines of what I hope to get out of my BPL subscription.