Ugh, well, I guess that makes sense. That also explains why Haste is a huge boost, and Slow is a massive penalty. I suspected the Plague hasting Haste on the entire party was to make the death countdown go faster, and this pretty much confirms it.
Acrtually, I don't think that's the case. I believe Count uses a separate timer, independant of everyone's relative ATB.
The Plague using Haste on you would succeed more often vs low magic defense multipliers and evade, which implies it favoring lower levels.
In fact, that "attack" is meant to help low level groups succeed.
If you use the PAR code 7E1800FE and 7e180101, you will fight the Plague battle.
The order in which the characters die is in the battle order I have listed for leveling up.
Middle, Uppermost, Lowermost, Middle-Upper, Middle-Lower
This always occurs in that order, regardless of their Agility stat.
This is also why Count works effectively the same regardless the level you have in the game.
Edit: Whoever propagated the Count/Haste rumor is a total douchbag.