"Part of the reason I wanted to this information is to see if a SWCG would have the capacity to administer a shock dosage of Cl. The Pool Pilot line claims to have Cl capacities of 1.28, 1.56 and 1.92 lbs. of Cl per day."

Every manufacturers capacity claims are rated for maximum output setting @ 24hr/day, with ideal salt levels. Yes, it will produce those figures. I was tested and verified by NSF.

"My reason for considering this is that I have to depend on a pool service company for maintenance for three weeks out of every four, and they currently use Cal-Hypo for shock...which I would prefer to avoid."

The need to shock by a pool service company is because most pool service come once a week, so they are only dosing your pool weekly. This in itself is shocking the pool, but as an extra preventative, they may do an additional shock dose. What happens to your chlorine level after 3-4 days is that it starts to drop pretty low. This gives the algae a chance to start, but also allows the germs to be more active (read...not safe).
Remember that with swg, the very process of generating chlorine is shocking the water of the combined chlorines (chloramines), thus the need to periodically shock the water is virtually eliminated. Just about the only times you will need to shock is for inclimate weather conditions, or large pool parties. As as has been suggested over and over again, manually shock using liquid or cal hypo (so long as you're not already dealing with high calcium hardness levels). This will help extend the cell life.