Yes, off a bottom bouncer, 4ft is standard. I only use a bouncer in 20ft or deeper, and its not very often I have to fish that deep. Generally in water less than 15ft, a 1/4 oz bullet weight 2ft from the spinner will get you down where the fish are, with about 100ft of line out, trolling 1.3-1.5 mph.
I like them 2ft because most times the weight will catch the weeds, and the spinner will still be clear. Its a lot easier to manage a 2ft lead than a 4 ft lead in that situation IMO. I also find a lot of times when I hook a weed, I give it a good rip, and right when the spinner frees from the weeds is when the fish will hit.....there is a short pause as it comes off the weeds, and whammo!
S.