I actually think the cldrvr deserves the money....
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You are not guaranteed your 2.7% unless you keep your flaps at TO till 400 and limit your bank angles (and there are some lateral/wind restrictions to take into account also). Raising your flaps before 400 will make you a test pilot if you do have an engine failure as the aircraft, as per the regs only needs to be certified in a single engine/TO configuration until 400 to assure the climb gradient, depending on how many engines are hanging of the back.
Ignoring the 400 ft, means there is no chart available to you in the case of an engine failure if your flaps are in transit/up to avoid that block of flats/school/orphanage in your takeoff path.