[Huttman]

Well I can see your point, but I would suggest that after twenty five years or so, the Empire's antics were probably wearing thin on most if not all star systems and planets, including the capital. If there were not rebel spies on Coruscant itself, there were most likely a lot of silent rebel sympathizers there waiting for the outcome of this rebellion. With the technology in their universe, media and telecommunications capability, that kind of information might not take as long as you might think to spread around. With the head of the snake cut off (Ackbar wouldn't keep it a secret), I'm sure too chaos ran supreme thoughout the Imperial forces remaining as to what they are going to do now to regroup and such, and that takes time to pick up any pieces left. A mob is a hard thing to control, celebrating or rioting (sometimes they're one in the same) and on a planetary or galactic scale, there weren't enough forces per capita to squander this victory dance. Well, that's my view anyway...