Not really. It is certainly faster than 68K, but not a hundred times.
We did quite some extensive testing of various applications / algorithm both on 68k and PPC.
First of all on 68K the is a huge performance difference between the different models.
There is a huge speed difference between a 68000 and 68030.
And again there is a tremendous performance diffrence between an 68030 and a 68060.
Of course high clocked PPC is faster than lower clocked 68060.
But in many benchmarks the speed improvement from 68030 to high clocked 68060 was actually bigger than the improvement from 68060 to PowerPCs.
Lower end PPC systems like EFIKA, SAM or G3-system can be catched by new 68K implementations.