Hizbollah has about 1200 fulltime fighters. And it hasnt yet used it fulltime fighters, all it has used so far are its reservists. And still the Israeli ground forces are getting humilated.
http://news.bbc.co.uk/2/hi/middle_east/5245116.stm"What we are seeing so far are what they call 'village reserves' - that's a very interesting thing. Hezbollah have not committed their troops yet," he says.
"What is in store for the Israelis if they go deeper, and then hold on to territory for a while, is that they are going to see the real combat in south Lebanon - a very classic insurgency and it will be a very costly one because then I think Hezbollah will commit its professional troops."