The numbers of Hizballah fighters in Syria are significant for a non-state militia force. However, the numbers are not large relative to the impact Hizballah fighters have had in changing the momentum of the fight in the government's favor.
Israeli analysts accused Asad of lying about the delivery of S-300 missiles. Unnamed US officials said there was no evidence of a recent missile delivery. If they show up, some intelligence services are going to be embarrassed.