I doubt it would outperform EPA estimates (you can only recapture energy not create it afresh with regenerative braking), but compared to ICE cars the percentage of stated range would be very high.
It’s because air resistance is a much bigger drag on efficiency for an EV, so stop and go traffic is a bit more closer to its ideal efficiency (which is going slow without stopping).
The Chevy Volt PHEV had an estimated 53-mile all electric range. During the summer, I routinely got 56-60, and once got 67.5 miles before the engine had to kick in.