yes.

Two possibilities:

The valve cover (a.k.a. "cylinder head cover") has to come
off to do this job. If it's not replaced carefully, its
gasket won't seat right, and oil will be spewed all over the
exterior of the lower engine. So inspect the lower part of
the engine. Try to see where the film of oil stops. If it
stops near where the valve cover seats against the cylinder
head, I'd take it back, explain your suspicion and the
problem and ask if they'd be willing to put a new gasket on,
in the name of good relations. If they won't, I'd eat the
charge, because the gasket should be changed every 100k
miles or so anyway.

Here's a drawing of the gasket and valve cover:
http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.
jsp?inputstate=5&catcgry1=Accord&catcgry2=2002&catcgry3=2DR+
LX&catcgry4=KA4AT&catcgry5=CYLINDER+HEAD+COVER

It's also not a hard Do-It-Yourself job.

Another alternative is that they damaged the oil pan. On
many (all?) Hondas, at least one engine mount has to be
freed for the timing belt job. The mechanic has to support
the engine in an alternative way while completing the job.
For my 91 Civic, one puts plywood and a jack underneat the
oil pan. If done incorrectly, the oil pan will become
damaged. (One shop did dent my oil pan!) Look for leaks in
the vicinity of the oil pan drain plug and around the oil
pan's gasket. You'll have to get under the car to see these.
Maybe refill the car with oil, drive it a few miles, then
put a big piece of cardboard  underneath, and trace the
drips to the source.

Re the oil pressure light not coming on: Some kid at a
private shop was troubleshooting a no start condition I was
having while on vacation and took off the valve cover for an
inspection. I watched him do it, and know he sped through
putting everything back together and was not attentive to
the valve cover gasket. About a thousand miles later, I
found the oil level on the dipstick barely visible.
Naturally I found the exterior of the engine covered with
oil. But my low oil pressure light never came on. The car is
fine, 40+k miles and a few years later. I replaced the valve
cover gasket, following the manual's directions and those of
people here carefully, and all was well.

Did they change seals when they changed the timingbelt?  They usually
do.  Perhaps they did not get one on right, or forgot it completely.

If the oil light EVER comes on while you are driving... your engine has
been starved for oil and some damage will be done!

As for the leak... if I remember right the oil dipstick tube needs to be
removed for this job. It may have not been put back in correctly and oil
is leaking out the tube.

Look carefully.

-SP