A3 8p 2004 - 30 mm lowering springs no difference?

So basically, your "s-line" springs are the height equivalent to our "Sport" springs.... which, for you guys, I can see how it makes the eibach pros a worthwhile switch to get your s-line car lower down. Here (in the UK) it wouldn't be worth it for drop alone.
 
You do realise that 30mm springs are not going to drop your car by 30mm, don't you?
As your car is a Sport it is already lowered by about 15mm (maybe a little more over time). Lowering springs quoted as having a 30mm drop will be taken from standard height, therefore you will only see a 10-15mm drop on your Sport, which will be hardly noticeable, as you are now finding out.

It's a common mistake/miscalculation people make when buying springs.

If you wanted your car to look "lowered" then you would've needed 50mm springs or coilovers.
Hi, I've got a standard Audi A3 2 litre tdi, will pro sport springs make a difference? Thanks