I've 19 model AGS and company claimed that they improved it compared to older versions to minimize jerk related issues.
Driven 10k+ so far and never used manual mode(even on way to Monal Isb). AGS working great so far, Alhamdulilah.
What I observed so far is if you drive your car in ECO mode i.e. below 2k RPM then no Jerk/Lag is felt except when gear shifts from 1st to 2nd. I knowledge that in eco mode car shifts to 5 gear on 50 km/h but I've not felt any kind of under-power-ness even with AC.
If you want to rev-up mean driving in non-eco mode, then all you need is to know the trick of taking your foot off from accelerator for fraction of second just when you know that car needs next gear.
I got 14-16 km/l with AC in city and 17-19 km/l in winters.