I would also like to take a minute to post my .02 on this subject. Up here in my neck of the woods we don't have the sub termite, atleast on my side of the water. Weird, but you go to one of the islands or East of the mountains and you will find them. Anyhow, I used to work for Orkin, but don't have experience with the subs so can't shed light on that part of the subject, but want to point out something else.
First off at Orkin I found that inspectors can and will write contracts to fit the customers (supposedly) and so may vary form one customer to another, even though the jobs may be similar. You can have to identical jobs with 2 different inspectors and may still end up with different contracts. Another point of contention is the technician. Bare in mind this isn't a highly paid job and so your at the mercy of the individual doing your job. Some truly care about the job they do and some just want a check. Unfortunatly this job requires you to take the work serious, because it is technical and does require you to stay on top of things. If you have a problem with an inspector or don't feel he's doing a good job, get another, same for technicians. Ann Wilson of the group Heart, had a contract with us and went through 3 techs before I got the account. Took me all of 2 visits to resolve the issue she had. Again it's just because I care. Whatever you do check the BBB and see how the company you choose is doing, I guarantee those doing a poor job are getting complaints against them, this is one area where people definetly complain. Shop around, but don't rule out the small guy with a good track record, often times these folks take far more pride in what they do than the big companies that have those employees looking for that paycheck.