Tom,
Have to agree with you here. I don't understand why CLDRVR has to be so aggresive and rude about a very worthwhile discussion.
At the end of the day I fly two types. One says flaps up at V2+25 and the other says flaps up when climb established. Neither type mentions anything about 400'.
Maybe i am flying under different regs to CLDRVR but maybe he could quote what reg mentions the 400' rule. Truly interested to learn.