He's both. It's drum corps, after all. Flash goes with the program. But also remember, he uses a snare with a kevlar head and pulled extremely tight, to give a faster rebound. I doubt he or anyone else could achieve that level of speed on a standard snare.
Check out this month's Modern Drummer. Patrick is featured in the back, where there's a big piece on stick twirling and adding flash to your playing. He gets quite a bit of space, actually. He's been a 3-time champion in drum corps snare drumming contests and is only 22. Very scary.
There's also a short piece on Nicko answering a fan letter. He's right below Danny Carey, one scary dude.