bbofey,
you are entitled to your opinion,but you are in my opinion wrong,by using the whole bow and proper wrist movement more power can be obtained,.
sorry.much as I like the Donegal style,it is not one I associate with powerful playing,particuarly on airs[where whole bow and good wrist movement really can produce good control,pleasant tone and varying dynamics].
in my opinion and to my ears,single bowing style is less powewrful to slurring three or any other number up,to prepare fora a long powerful down bow and thus creating emphasis,but we all have different tastes,and there is room for all styles.