Very few of the regulars around here have a completely 'non-modified' truck, but nonetheless--yes, the torsion bars will act just like stiffer springs in a car would (since that is all they are...)
Yes, the ride will be noticeably stiffer. Uncomfortably so? That depends on your definition of uncomfortable...I consider my truck just barely tolerable for long drives (6+ hours) when my Swampers are on. (Exhibit A in the argument for not selling my AT's off...)
In my opinion the reduction in body lean & brake dive make the t-bars worth it. Not sure about slaloming...with my tendency not to reconnect my front swaybars very often, I stay as far away from slalom manuevers as I can!!!
