im assuming no filter means lots of crap and particles gettin into the throttle/engine. not horrible if for a little bit, but that type of stuff can cause engine damage. id really fuss the hell out of jiffy lube, ask for your money back. and if any problems arise from the no-air filter, take it back to jiffy lube and hit 'em hard.

my brother has our familys 97 subaru legacy and went for an oil change at jiffy lube. they forgot to tighten the part that keeps the oil from draining. he didnt know until he tried to leave his friends house later that day. his friend's dad came out, noticed a trail of oil, and they followed it for 3+ miles, searched around and found the screw or whatever that had fallen off. needless to say, i went back and b*tched them out and got our money back.