[Quickurt]

I'll probably get jumped for this, but on most general items, such as wheels and calipers, the bolts all tightened the same amount is more important than all being tightened to a specific tightness, plus or minus 5%. 25 or 30% is a different story, but I doubt even cheaper torque wrenches are that far off.
Bolts that require a certain stretch amount, such as spindles, rod bolts, main bearing bolts, etc. are a completely different animal.
There was a rash of prematurely warped front brake rotors at the RX8 forum, several years ago. Turned out most were guys who changed/rotated their wheels without torque wrenches and the way the RX8 front spindle/rotor/wheel assembly was made, uneven tightening of the wheels would warp the brake rotors and distort the wheels. It was a case of uneven tightening, not a case of evenly over or under tightening.