On Saturdays, I usually ride with a couple of other guys. Both of them owned STs previously, but have since transitioned to other bikes. That's fine for them. I'm staying with my ST for the long foreseeable future. I digress. As we mounted up after a stop to stretch (and unload ballast), I was waiting for one of the guys on a Ninja 1000 to get ready. I watched as he mounted, started the engine, pulled in the clutch, and shifted into gear. (I usually leave my bike in gear when I stop so it won't roll off the side stand, but apparently this guy doesn't.) Anyway, when he shifted into first, I heard the "clunk" even with helmet and earplugs on and the bike lurched a good half foot forward. I asked him about it later. He said it's normal for that bike.
I've never experienced anything like that on my ST. It may clunk sometimes, but it's not violent like a Ninja.