I do not know. And I have no real first person information on Syria except for one friend who is half Syrian who has some family in Homs[1]. However I'm dubious about the 300,000 number since it just seems to be reflexively repeated for years. And because sounds like the number of people escaping Eastern Aleppo is a small trickle. Despite that it's barely a functioning city at this point.
Also there is this.
> While aid groups estimate anywhere from 175,000 to 300,000 people still live in eastern rebel-held Aleppo, it is difficult to gauge the accuracy of figures from rebel territory. For example, Darayya, another besieged rebel-held city, was said to have more than 8,000 occupants. But last week, when government forces evacuated the entire town, they found fewer than 2,000 people still residing there.
