converter slipping

Ive not had a lot of experience with hi-stalls. The few Ive driven felt,on the street, like big old rubberbands.Until they got close to their rated stall, then hang on! Even stalls around 3000 felt strange to me. But then, Ive been a stick man since 1970 when I bought my first Mopar; a Swinger340. Panther pink no less.
From what Ive read here amongst the turbo crowd; Most say they go faster and quicker with the lower number gears. I have no experience. Yet.