I'm using Zong and yes currently their 4G is giving same speed as their 3G. But their 3G is still faster then the others...:), 2ndly, they have put capping on speed as of now. Why , I donno.
Warid will launch 4G (donno if it's gonna be HSPA+ or LTE) in few days. The problem however, will be the bandwidth, Warid only has 8.8 MHz bandwidth on which it'll be launching all services (voice/SMS/Data), it will be just like driving a farrari on a service road alongside all the slow traffic, you can very well imagine how fast you can drive a farrari in such conditions. Whereas, Zong purchased totally new spectrum for 4G specifically, which means a motorway specially layed for your farreri..:), Zong now has 30 Mhz bandwidth in total.
Now do the maths and judge which operator service will be faster..