Sensible posts above that have described the seat fit correctly. The FI airbridge is low density and outside of RIC changeover the non-buisness seats are usually more popular as the low number of pax can routinely stretch across a number of them.
Priority for the 'business' seats goes to aeromed (if not stretcher bound), aeromed escorts/medics then fare paying civilian passengers then compassionate cases. The 'Senior Passenger' then gets his comfy seat allotted (although I, like many, offered my 'Senior Passenger' seat to the most junior chap on the manifest) before the rest are churned out.
The 747 proved very popular due to the freight space offered which was then bulked out with fresh product. For those who only remember the scurvy days fresh fruit and veg can now be found in abundance in all the messes (rather than just the WO & SNCO mess!).