They're great in the bends. AG to sport on a 211 is a good upgrade. But I drive in rural areas
Majority drivers choosing these 'sport' options don't make proper use of them. (My observation). They want the image without actually utilising the substance. Not dissimilar to the 4x4 situation where vehicle are bought with an investment in technical features that are of zero benefit and possibly cause a degradation in actual comfort, economy, and practicality.
I'd guess the majority of pre-facelift W211s sold in the early days in the UK were probably AGs. And I'd guess after the facelift the proportion of Sports increased.