The number of people who have had their bikes remapped would mean that there's a very good chance that it has been. There's a thread on this forum at the moment and I think there's about 30 of them have arranged to go for a group discount.
If there's no flat spot, you would notice it, then you've saved yourself £350.
Does it make it as good as a WC?
In my opinion, it would put it somewhere in between.
When I tried a TC at a dealer when they first came out in 2010, I thought it was wonderful. When I finally bought one two years ago, I thought I'd been sold a pup. It was 'orrible. I believe that the demonstrators were remapped.
I tried a WC a few months after I bought the TC and was tempted.
Instead, I tried to make mine like the one I remembered and started looking at re maps, etc.
A remap wasn't economical for me because of where I live and used a PCV for a while. Big improvement!
Ended up with AF XiED units. All of these things improve the fueling and it's a very emotive subject on this forum.
Details about all are available if you look.
Good sales ploy from BMW. If you want your tractor like, GS to run like our new WC, you're going to have to part with lots of money.
Now that I've got my TC running at least as well as that demo bike, there's no way I'm parting with 8k to change.
It sounds like you've been lucky with your purchase so just enjoy it and don't worry about it. The difference is minimal if yours has been done. WC owners have to say their's is much better because of the money they've spent!