The problem being the review doesn’t use the same terms in the program.
Like hybrid cars they have dual means of propulsion.
As far as the avast! update go there are the regular auto updates and also streaming updates from the cloud services. This allows for faster updates for virus definition updates that can’t wait for the next auto update.
Hybrid update technology is one of the main features of new Avast 7. As it sent new virus definitions in real-time via streaming updates, a full database update (regular update) isn’t required to get full protection from latest threats.