Yes definitely, like linking a Linked In or a Facebook (if public) is always a good way to show the social side and see if the applicant is a good fit for the team.

Hahaha Because you have experience and you're fast XD That's how you find out beginners I remember bugging 2 minutes surprised by the question at the GDC x) Especially when you tend to work 16-20 hours on a portfolio piece it make it pretty x)

BTW, I just looked at Sam Hoggs' portfolio website, I was amazed by the quality of it ( Presentation wise, technically there is no question about it haha) I think it can be a good exemple for an online portfolio what do you think ?

http://www.artofsamhogg.com/concept/

Cheers man !