I'm never not ceased to be amazed by how often Sherdog confuses pressure/volume punchers with actual power punchers.
KOing somebody after you hit them 5+ times in a row isn't a power puncher. You're KOing the guy because you eventually hit him with the shot he simply didn't see coming or could no longer continue to absorb. The finishes are mostly based off the previous work and the last strike is just the tipping point. It's like a video game where the opponent has a health bar you simply chipped long enough away at.
That's wildly different than hitting guys with 1 shot and the lights are shut off. That's power.
Obviously everybody can occasionally do this. Anybody can 1 shot somebody if you hit them perfectly. But if the majority of your KOs are coming off long combos or repeated strikes, you're not a power puncher. You may hit hard yes, but you're not a power puncher. Nor should you try fighting like one where you're looking to land that 1 big shot as your opponent will likely just be able to absorb your strikes without going down. You need to stay in their face to put them down.