Physics always wins. The LCD based on media streaming is a power hog like the MXPE. Plus the always on display sips some too.A couple things...
1) We don't have the final version of the V20 to test yet
2) Even if those #'s don't improve with the final version they're still better than the V10 which is good to see.
I don't expect the V20 to outperform my S7 Edge battery on a single charge but at least the V20 can be swapped out with a fresh battery. It's the fastest way to go from 0-100.
Not surprised if there is zero improvement with retail units. What matters though is comparing one's own usage with previous device. Comparing to other people is comical due to all the variables.