I predict:

• utilitarianism's the most common philosophy
• a clear majority will be non-religious, and respondents often identify with skepticism/atheism as a social movement
• a clear majority are left wing
• most respondents are under 30, with 50% students
• people often heard of EA through Peter Singer

And the most significant outcome:

• There will be many non-students without significant donations, which in my view is not a good thing at all