I bought a Rans V2 last night from the LBS. It's black, so I don't think it's the latest model from Rans (which is red). I've heard the Tiller Effect was eliminated on the latest model. I took this one on a long test ride before I bought it and didn't notice any problems with steering (except my feet would bump the Mueller Fairing on slight curves). I've read Sheldon Brown's definition of what the tiller effect is, but I still don't get it. Maybe the problem was eliminated the year before my model.....? I worry too much.
If you did not notice it then don't worry about it. I ride a Rotator Pursuit which is similar in geometry to your bike. Tiller is simply wheel flop. You will notice at low speeds, not anything above 8-9 mph. When you are riding slower than that you may notice that the slightest input causes the bike to veer left or right. If you try to steer back you will invariably oversteer. All of that is from tiller. You will get used to it and in a few hundred miles you won't even notice it. I can ride my Pursuit down to 3mph steadily and it has a reputation for extreme tiller effect.