Had surgery in Sept 2002
I don't know exactly what surgery you're talking about, but I can tell you my experience with what I had done in Sept 2002.... basically what I had done is detailed here...
http://www.shouldersolutions.com/impinge_4.php
I had bone spurs, i.e. growth of new bone, that lead to an impingement and also casued some minor rotator cuff tears, very minor tears. I was hurting pretty bad 4-6 months before I had surgery. I had a single cortizone shot to reduce the swelling, took some time off of lifting, but once I hit the gym again, the same syptoms came right back. by the end of it I couldn;t even raise my arms high enough to put on a tee-shirt. Very painful. I got so frustrated in the gym because I couldn't even do legs, any pressure on my shoulder would KILL ME (i.e squat bar, pads on the hack squat machine) lifting was totally useless. my doc said that It would hurt for 6 months after the surgery.
I had my operation done arthroscopically on a Friday morning. they basically go it in 3 different spots on my shoudl front, back, side and grind down the bone. in my case they only cleaned up fragements of torn rotator cuff, didn't need to stitch anything together.
I took the following monday off of work and was back in work on Tuesday with little discomfort. I did have my arm in a sling that restricted my movement. I came out of the sling that week, it was just a pain in the ass to wear that thing and explain to everybody what the deal was. I just made sure I never lifted anything. I went into physical therapy shortly after that for about 2 months of and on (I was traveling for work at the time and couldn't get in every week) the beginning of PT was very good with the stretching and getting mobility back, after that they work on strength without pain, my strength came back pretty fast but I still had some mild discomfort.
I asked my doc about getting back to the gym and if lifting would fuck anything up, he basically said that in my case since there was no muscle or tendon damage, only bone issues, that nothing I coudl do would screw up what he did, but take it slow anyway.
I made it back into the gym end of november and did some light sets for shoulders. next day I did feel some discomfort so I held off. I did go back to the gym to start getting the rest of me back in shape, just laid off heavy shoulder stuff and my goal was to start lifting hard right after the new year. SO in Jan 2003 I starting hitting the weights hard again, and at this point I am easily back to my old poundages, probably more at this point and every thing is A-OK. still get some discomfort every now and again, but nothing llike before. I do throw in some rotator cuff exercises now and again becasue that seems to stop the clicks and pops (that I had before too).
Long story to answer your question..... I Had my surgery beginning of Sept 2002, and I was back in the gym hitting decent weights at Jan 2003, so that's about 4 full months of being out of serious weights (I was lifting small weight in December and NOT hitting shoulder exercises though, just stretching and light weight strenghtening exercises)....