Probably not normal.
I ride a 2003 K1200GT, similar to the K1200RS. I don't fast release my clutch in 1st gear, though. I typically clutch slip it to get it rolling and for control creeping around a corner low speeds. Same in 2nd gear, slipping it on corners. With the clutch fully released, the bike has a very strong pull.
For you, maybe you start in 1st gear and get the RPMs up to 4-5k without shifting. See if the bike pulls solid up to the higher RPMs. Repeat, do the same in 2nd gear.
If the bike doesn't pull like a freight train, something is messed up. Good luck on your research