I think this helped me in getting the job I currently have at Amazon. At the time at least, the interview for new grads was done entirely online. I performed much better in this than any of the other on sites I did because I could focus exclusively on the problem at hand.

After a few years of experience that I've gained, I don't think it would matter much, but as a new grad there is a lot more stress and you likely haven't worked in a professional setting so you're not entirely certain what is expected of you and how "good" the interviewer is themselves.