I'm not sure about this, but it is interesting conjecture and at least the author admits himself that it may not be the original intent of the authors, but I think many of his pieces do fit well, just like the Rinoa=Ultimecia theory.
I have always been bothered by the icicle thing. I could easily write it off as "oh someone just cured him," but what screws this up for me personally is his own incredulousness about lacking a wound. Squall makes note of the fact that it doesn't make sense, so even if some crazy JRPG world, the character himself is saying, this shouldn't be. It's odd that this is never explained. Someone easily could've at least mentioned why he wasn't dead in passing later, but this never happens.
Oh... and damn you people. It seems like every day I'm straying more and more outside EoEO.