My Legacy Content and P8Content both took about 1 hour and 32 min each, for me and Installer took about 30 minutes.  I got it yesterday at 4:30 am EST.  Now that it is out and many are getting it, I am sure it will take longer......in about 3 days it should be faster.  That is how it was with P7, I remember, I opted for waiting the 3 days for that one.  Sharen