I recently got a chance to use a 1005g1 (lower end i3 of Icelake family) and was quite surprised. I had it in my hands a bit more than a week before we had to send it back due to issues (SSD "died" and resurrected 3 times in 10 days, was definitely faulty).

Felt definitely faster than the 7200u I keep using, though I didn't get much of a chance to benchmark both. I also noticed that, despite having a much weaker battery (some 36W/hr mess), it managed to pull 6hs on a single charge, on merit of dropping to 1.2Ghz as fast as it could (though it quickly climbed to 3.4Ghz if required).

It's not well known due to Intel's fab failure, but Ice Lake is huge improvement for IPC and perf/watt.

Ice lake definitely brings IPC improvements, but there’s a big asterisk: it can’t clock as high as their 14nm parts.

So results can be a little mixed. It’s clearly pulling more weight at lower clocks but lacks the high frequency performance of intel’s hella refined at this point 14nm process.

And that’s what makes Tiger Lake interesting. It’s all the good stuff Ice Lake has going for it, but now Intel is able to take off the training wheels.