josh,
i cook using cold base but it's certainly far from a "cold" cooking technique - i aim to keep the heat in the pan high all the way through adding the ingredients in stages (much the same as i am sure most of us do). i have tried in the past the all in method that Dipuraja uses. it does produce very good results. i am thinking that i need to adopt it for the "soft spice" type of curries (for want of a better description) ie CTM, Korma.
the difference between the 2 methods though in the cold light of day for the "hard spice" type of curries is very stark ie madras, balti.
as i've said previously i'm not convinced Dipuraja uses this all in method for all dishes during service. u can see in some of the video how good at cooking he really is.