A quick google gives an S3 1/4 mile time of just under 14 seconds, and around the 5.5s mark to 60mph
An R1, depending on which model is about 10.5s 1/4 mile and 3s 0-60
An R1 should annihilate an S3 without breaking sweat.
All sports bikes will annihilate an S3, even 600s, in a drag. I think the OP was just saying it was surprisingly quick , not that he couldn’t have caught it if he wanted to.
On a tight, bumpy, pot holey and twisty road it would be hard work to keep up.
On certain roads (i.e. as described above) I reckon I’m slower on my Fireblade than I was on my Street Triple R.