Yes, in essence, it is a triplet pattern played in four. Not THE standard way but it is a triplet. This one's the galloping three legged horse triplet.
It's a triplet in that it's a 3 beat pattern. It's just not the straight even triplet that everyone's used to hearing. He's using 2 16th notes and an 8th and thats what gives it that galloping feel. But it's a triplet pattern nonetheless.