Hi, pauleti68,
Something to consider is how the Thrust Levers are handled by the Pilots. Yes, I could slap the levers forward and get the thrust I want very quickly. On the other hand, I could be less aggressive with the Levers and achieve a slower acceleration. What I'm trying to say is every application of thrust is variable. But having over 2000hrs on these planes, I can confidently say the simulated rates are very accurate. As has been mentioned, they're small engines. There's not a lot of energy needed to get them rotating. There's a slight difference between the 146 and RJ, as the RJ's have FADEC. You could even argue there's a difference between the 507 engine variants on the 146 (different engine fuel system, not pilot controlled), but that's getting too deep into it.