Yes.It took longer to get up to highway speed.But was fine at speed and with my wimpy (4 wheel)driving style.I know that i would have to wait if stuck behind slower traffic in hilly terrain.I'm willing to be give up the accelleration that the 6 would give me.
My trackbike weighs 355,and i only do a couple of weekends a year.My trials bike would spend a lot more time in there.But it weighs 142.I don't think it's a really big issue.But i will be the guy doing 100kph on the 401 in the right lane for an hour.
4 cylinder pickup truck is fine and returns great gas mileage. I know you're talking Toyota but at the risk of getting banned for life I'd like to talk about Ford Ranger/Mazda B2300 4 banger 5 speed stick. I can drive that thing all week, never go above 3000rpm and have no problem keeping up with traffic. I have to think 4 cyl. Taco could equal that. It's my personal belief most people are driving to much machine and wasting gas.