Worse than usesless, it's misleading.
Most benchmarks are merely useless because they're generally measuring "turbo speed".
A fair benchmark would "warm up" for 2 minutes then run for 10 minutes and see how many loops (of slightly modified operations to prevent RAM cache cheating seen in FPS game benchmarks) the benchmark can perform.
I don't use Premiere every day but when I use it, I use it all day long. Any time I take a break from rendering, the first couple minutes are always faster than the next couple of hours because the machine heats up. Yet almost every benchmark I've ever seen completes within 5-90 seconds, rendering the whole simulation rather pointless.
Best yet, give me a benchmark that warms up for 30 minutes and then renders from minutes 31-60. That'd be more accurate and useful. The difference between 5 and 10 seconds being "twice as fast" is very little compared to something that takes 2 hours vs 4 hours or worse, 20 hours vs 40 hours.
GeekBench is just a glorified pissing contest.