Well, that was inconclusive to say the least!
I fished two short sessions over the past two days on a new-ish stretch below Worcester.
First time out (12.30-4pm and 8-10pm)1 bite, 1 short,plump barbel about 4lb to conventional boilie rig.
Today fished (11-4pm) same stretch, two fish. One to conventional boilie (about 5lb), one to critically balanced (7lb 2oz).
I was using 12lb Daiwa Sensor mainline to 10lb Maxima hooklink between 2 and 4ft. Leads were free running grippas between 1.75 and 3oz (there was a lot of extra flow on first time out).
Boilies were 15mm Source and Source pop-up.
I fished the balanced baits so that they were still boilie shaped, matching the freebies, rather than true snowman-style.
There was a slight difference in the critically balanced take. There were two distinct twitches before the wrap-around. The conventional boilies produced conventional takes...
Looks like more research is needed...