Nah you're wrong. Ok a really early Uk turbo is not brilliant from 70+mph but off the mark and up to 60 you show me many hatches that can do 0-60 in less than 6? The early Uk are 208bhp and light as a fag paper and therefore they are not as slow as you're trying to make out. As I say after 70-80 then yes luxobarges and even (god forbid) some decent Tds will be right with you but the standard Uk Impreza is not as tardy as you're making out.
Factor in a remap of death and with 230-240bhp they are solid perfomers even by todays standards
Plus...whilst 4wd does add drag etc its truly great for getting the most out of the car on Uk roads.