You should be careful with using the term "punk rock" to describe Green Day. 'Course, they are influented by punk acts like The Clash and Sex Pistols, but if you listen THEIR, or even more modern bands like Rancid and NOFX, you'll see that there IS a difference. So
punk POP is a
lot more accurate in my opinion. Also, the ¡Uno! album is supposed to be power-pop (
source).
Good review though, cool to see that someone else likes Green Day (though they're really popular).