Soft Reset clear you've done all you do is you take everything external to the tablet, so if persists is not a bad application, but by some internal software failure.
Anyway, I mention, it is normal that once you start and is the home screen, late as 10 or 15 seconds, which is already starting all processes of the tablet, applications, connections etc.
That's also normal that if you open prematurely give you problems with the launcher as this is still starting and setting, but a minute is a long time.
I also tell you that after a new installation, reset as you have done or firmware change, the very beginning, but especially the former is desperate is because putting everything in place and adjusting the tablet to change, there are people that has come to take almost 10 minutes, I personally never more than 5, generally between 2 and 3.
So if you take a minute it is fine, another thing is that after a couple of days and several turned on and off, at least they are 5 or 6, you continue taking the same or more.