If you are curious about how long the current Average App Store Review Times is, you can go to:
http://appreviewtimes.com/

Also, you can submit your own review time by tweeting as in this example:

60 Top Hat Piano Grooves Vol. 1 by Ariel Ramos took 3 days #iosreviewtime
https://t.co/0hQTehlW3M

— mDecks Music (@mDecksMusic) September 2, 2014