<p>^^I came across that article yesterday too and had sent it to my MT daughter. 
She found it interesting. I do think that today having a presence on the internet for someone in this field is beneficial. But make sure you only have positive stuff online! 
YouTube was not around when my kid was in high school and so no videos of her in shows are online from before the college years. The college and professional theater productions typically have not allowed video but she has a lot of other videos as a professional online now (ex., she is a singer/songwriter performing regularly in NYC and sometimes elsewhere). I have seen many examples first hand through her and other friends where people in the industry have learned of them through such samples online. Also, the article talks about the exposure for composers and songwriters (she does that too) and I think again, the online presence has had an impact on the career.</p>