No. I guess it was because of their Free CD and spread it forward culture. I have seen that there are groups which are spreading the linux CDs, from ubuntu, canonical. So mostly this is because of the sharing culture.
That is not all. Check the forums for ubuntu, they allow you to vent and be respectful at the same time. I have seen some nice debate threads without attacks. Ubuntu users also reply with care and with the same attitude towards their own questions, so that makes it more friendly.
Problems exist for almost every platform and being a debian branch, these problems are stacked per distro level. But I know it is because of sharing culture and friendly community.
its also just a great Distro... so many other Distributions are based on Ubuntu (Mint, ElementaryOS, SimplyMEPIS etc) so this means Ubuntu users together with Ubuntu based Distribution users makes up quite a number...