I've seen somewhat official claims of 2.73 (Ricky Gadson) which I don't doubt as she's a relatively easy beast to launch but you definitely from my experience need TC off. You can launch pretty quick with it with care but without it, it won't bog you down if you go to hard. When I raced the two litre gixxers and blew them away, it went like a bat out of hell .... only small wheel spin and fish tail and was gone before they knew what hit them. I'd definitely beat myself on my 2013 S1000RR but my old 2012 Diavel Carbon would probably just take it. But then it wasn't stock whereas my Rocket is. It should be able to launch hard and fast all day .... they're promoting it as such a bike. Can't wait to get it back.
Rickey Gadson And The Triumph Rocket 3 R
I am honestly surprised he did not get it into the 9s. It feels like a 9s bike but what do I know?!