I can agree, well, it is not so slow, the power to weight is ok, it's not a supercar, but it follows the roadster mantra - low weight, not so much power. Especially if we are looking at roadster fathers, like MG and Triumph models.
Z4 as I said is more serious, but you can feel that 350kg+ more weight. Maybe I just got used to light roadsters with not so much power. And I didn't know that 350Z is heavier than Z4?
When I buy a new set of wheels, I will definitely give a chance for Z4 to show himself on a track day. I have a benchmark track here in Croatia, where I drove my Miatas, Lotus and tested different cars, so I will see what he can do. It has 208 HP (as it was remapped by the previous owner).
Funny to say, but the previous owner switched to 3.0i Z4, and then to Boxster S, and he said, that it was a small difference between 2.5i and 3.0i, and he still didn't get that excitement on a track, but Boxster S really gave him that feeling, now he has that Boxster for a very long time and he is happy with it. I tried regular Boxster and I wasn't impressed.