Sure. I saw him bowling at average speed of 142-144 KMH for the whole test in India and here he is bowling a bit higher speed in general and touched 150 KMH.
Now if you can not classify this as fast then we will have very few bowlers in history, not just right now, who can be clasified as fast. Some bowlers like Lee and Akhtar can be clasified as express but you can count the bowlers on finger who can bowl faster than this for an extended period.
He lacks some control though so yet to be seen if he improves in next few matches. Just bowling fast is useless. Saami used to bowl fast but he should have never played the test cricket.