The acceleration G's are very low. You go from 0 to about 250mph in about 10 seconds, which is 1.14G's. Kingda Ka's acceleration is 1.65G's to put that in perspective.
The g forces on take off in a jetliner are nothing like what they are on a launch coaster. I fly quite a lot and have been on enough accelerator coasters to say that they are not even close.
The take off in a jetliner is really cool though, like the feeling you would get in a very quick accelerating car, rather than an accelerator coaster.
They're not as intense as the more intense coaster launches I've experienced in forces (or sense of speed), but there's a good amount of force there and it's sustained for a long time so you really can enjoy it.
You had a truck that could reach 150? Our old suburban (the real ones that were a modified Silverado, not the new shitty SUV ones) couldn't even hit 90.