well my experience has been different. the more u mess with stock family saloons the more shit u get in. i have seen ppl expecting too much from a family car here. its not that bad if u treat it as its supposed to be.
i have a Gli and im running yoko c-drive in it. 185/65/14 (stock rims).
cornering has been improved since i reduced the front tyre pressure to 28psi. (braking distance has reduced but still brakes are not good, no ABS in Gli)
i have driven this car on stock as well as low profiles.
lower the rims stiffer the ride. its common sense. i have seen cars over steer and under steer with lower profiles.
try it out and u will feel the difference. plus deviating from standard/stock settings may hamper ur suspension life.
mazher, yes the steering would be sensitive and the car will give you an unstable feeling but you gotta live wid this pal! safe driving (y)