That may work for you, stick with what works. I used to eat that way but prefer to eat larger meals. Eating small meals I would never be satisfied
Overall though the overall calories eaten is what matters. Doesnt matter if you eat them in 3 or 6 meals.
There has never been studies proving meal frequency increased metabolism, its all heresay
There is also a study where metabolism rate increased (6-10% IIRC) from short term (24-36hr) fasting