I'll take the other side of the question then , I have always fished a slow roll on my anchovie with a long leader and have done quite well over the last 30 years thank you , springs are opportunistic feeders and will take the easy one first in my humble opinion , if they have to work for it ....nada , unless there has been no feed available to them ........coho ! don't matter they are insane feeders and hit anything when feeding.
Cheers
AL