Looking for research or commentary on what makes for a reasonable start up time for an iPad app. Obviously, it depends on the processor (iPad Air i.e. iPad5 will be much faster than an iPad2 or iPad Mini), the connection speed, and the size of the app. But say all of those factors are controlled/averaged...what is the amount of time a normal user would consider normal, reasonable, long, or rediculous to startup an iPad app?
Much of it is the expectation of what the app is giving the user, so I would love to hear how to manage that expectation as well.