On the face of it, this looks like an initial low altitude level off at 1,500', (unusual so low, but possibly for strategic or clearance reasons), followed by a noise abatement climb with thrust reduction at about 3,300' and then acceleration.
Without knowing the TOM or flap setting or the SID etc, it looks fairly normal to me, apart from the level-off at 1,500', (during which it looks that they might have got up to Vfe speed).
151 mph is about 173 Kts, which seems about right for the initial climb.
PS @ victorc10, why so nasty? A person can ask a question. If you don't want to reply, then don't bother !