it depends more on what tyres you use, used to have pirelli p6000 on the cinq it had very heavy steering changed to some cheap tyres stering much lighter
my old 75sx (no power steering) had 17" alloys on, when i let someone else drive it (who owns a fiesta :yuck: ) they thought it had power steering lol, so i dont think it makes it too heavy...
ive got a mk1 punto 55 with 17s, steerings not heavy at all allmost as light as my instructors ford focus and thats got power steering. Im a learner and i find it easy enough to drive around anyways