This change is just an Arab part. It is much deeper change as European fall of communism. Ans it is going to take little longer - similar to so called period of south American revolutions from beginning of the 19th century. Rationally speaking, Arabs won't be led by army stick anymore - they are not afraid nor it is working anymore. They won't be led religious bluff too, but some time has to pass to discover that. Both options in Egypt are just contemporary for the ruling generations to pass away. If there is no serious change in mentality in Europe in democracy - which is nothing but optimal system of deceit, Arab transformation may take longer and agonized time.
Police arrest 18-year-old Palestinian suspected in Old City stabbing (Haaretz)
from the article: Gangs strike out at Egyptian protesters at Tahrir Square rally