Triggers man, they're pretty common nowadays. Look at it like playing an acoustic drumset and an electric drumset at the same time. It does add a little beef to the sound of the bass drums, cuz sometimes the frequencies of the bass drum tend to mesh in with the frequencies of the other instruments and sounds, making it more difficult to hear. I could be totally wrong, but Addicted sounds like it uses a blend of the recorded acoustic bass drum sounds AND the triggers, the triggers adding pry a little more high-end to the bass drum allowing it to penetrate the wall of sound (maybe a bit more bass too, I notice the high end triggering more). I've never used triggers (been drumming for nearly 13 years, and writing/mixing in my spare time for about 6 years), but I don't have any problems with them, as long as they're not being used as a replacement for the recorded bass drum & quantized afterwards (l33t speak for midi'ing a drumset and adjusting the delicate timing of each individual hit so the rhythms are computer "perfect"). The drum parts need to be very very intricate for me to be OK with the artist flat-out quantizing the drums (aka Periphery...they're freakin great). But that's just me
Of course, what you're talking about, at the very start of the album, I think there is probably some heavier triggering happening. If I wasn't in the middle of "Awake" right now in my playlist, I'd go back and listen to it haha