Brown eggs are often quite a bit smaller than white eggs so that may be a factor.
I not sure, all the eggs we have bought when in Avsallar are white and really small, so small in fact that we have to stuff the egg cups with kitchen roll as they were too big for the eggs.
Cant get the timing right either, at home I always buy large eggs and put them in cold water then 3 min when they start to boil, perfect dippy egg, but I cant get it right in Turkey tried all ways and they still come out like bullets.
It's quite simple really, brown hens lay brown eggs and white hens lay white eggs.
Kipa had 6 brown eggs at 2.95tl, 10 white ones 3.15.Angie.