Its all in the tuning, I have ridden in trucks with 4094's that spool wicked fast, My S400 is laggy but it doesnt bother me. I run a 1.10 housing and the 4094 trucks I have ridden in have the 1.06 housings.
I totally agree, plus if you go really big you can still get it to spool fast with a looser converter. And if anything like a gasser a well picked cam can help spooling also