Simply because you were able to get Brutallus down to 25% doesn't mean you're going to be able to go in and kill him now. They aren't being "nerfed", they're at the same level of difficultly, adjusted for new raid mechanics. I usually don't have too many issues with WowInsider articles, but the author clearly misses the point of the HP adjustment to bosses.

/agree with Blake

A lot of this controversy could be avoided if everyone referred to this action towards TBC raid bosses as what it is... re-balancing or re-tuning. Let me repeat this is not a 'nerf.'

As an MT warrior, my gut reaction is... '40secs between shield blocks?! I'm done for.' Although I know that isn't the really the case.

There are sooo many changes going in, I suspect that some bosses will be very easy and some will be much harder. Try getting Brutallus down without chaining drums / bloodlust. The 30% reduction along with all the mechanic changes will help some raids and hurt others.

In any case, its just another month that I'll be tanking in bizzarr-o outland.

Why are people so afraid to call a nerf a nerf?
Nerf (v) to make a video game dynamic less powerful.
Whats the big deal? Lets honor the memory of George Carlin and not wet ourselves trying to pretend something is different because we give it a more comfortable name. They are nerfing content for the last month before the expansion while everyone gets used to new dynamics. Its not rebalancing. Its not fine tuning. Those euphemisms imply someone actually worked out the details of the dynamic to make sure that it WAS actually still balanced. When you lop off a flat % of HPs from every boss, you aren't accounting for detail. You're making them much much easier so there is no chance that any encounter will be harder whatsoever.

Why are people so uncomfortable with the truth?

"Nerf" implies a change that is implicitly bad, reducing the power of a game mechanic, encounter, or player ability to bring it in line with the rest of the game.

"Rebalancing" implies a change that is implicitly neutral, either reducing or increasing the power of several game mechanics, encounters, or abilities to bring them all in line with each other.

All the raids are being brought in line with the new mechanics and player abilities. This is not a "nerf," then, but "rebalancing."