My current car (the Stinger hasn't arrived yet) has the
paddles attached to the steering column. When I first got it, I thought "that's arse-about, my hands should basically never leave 3 and 9 o'clock, that's where the
paddles should be", but I became accustomed to the column-mounted
paddles, and as you've noted, it's now very easy to know (in relation to my body position) exactly where the
paddles are, without having to think about it).
However, as much as there's a theory that we should never have our hands away from 3 and 9 o'clock, that's not reality on public roads. When I test drove the Stinger the first time, I struggled to reliably find the
paddles when I wanted them - partly because of muscle memory in reaching for the position to the left and right of the steering column, and partly because I was, particularly at low speeds in tight corners with light and slow steering, forced to cross-over, and because I wasn't following strict motorsport behaviours (you only ever grab the wheel at 3 and 9 o'clock, even when crossing over) in my arm-crossing, missed the
paddles a few times.
I'm hoping that I become more accustomed to the wheel-mounted
paddles, and I suspect I will. But I do know that it will take a bit of time.