Well they could be pretty fast. They said that the new mac mini’s have 3x faster cpu than previous gen i3 quad core.(found this in the end of page in small print) so it would mean for example geekbench singlecore score about 2800, and multi 9600...
Also the same for mbp 13, could be that M1 would have geekbench single 2000-3000 and multi 9000-12000. Which would be huge.. but we’ll see next week.
GPU wise it looks like it's 3 times faster than Intel Iris Pro 645 which would give geek bench metal score of about 16000 which is approximately older MacBook Pro 15 inch dGpu.
TBH, even if its current real-world performance is no better than the 10th gen MacBook Pro 13, just matching that level of performance but achieving its level of efficiency is pretty damned impressive.