Uh,
Did I miss something? I don't recall anyone saying Skylake gets outperformed by 2014 processors, unless you're just looking at a 2.4ghz current gen compared to 2.8ghz 2 years ago and calling it "better" because it's .4mhz faster.
4980HQ outperforms 6700HQ according to CPUBoss and Geekbench. Yes the older chip is clocked slightly higher....but you get a system with that chip for less than half the price.
http://cpuboss.com/cpus/Intel-Core-i7-6700HQ-vs-Intel-Core-i7-4980HQ
I'd recommend to wait for benchmarks on the actual MBP machines. The RAM configuration is different, which will probably have significant impact on performance.
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Or it could be a little worse. The 6700HQ Skylake benchmarks I have compared to the 4980HQ were paired with DDR4, which Apple has neglected.