Instinct radio load time, lag time.

Ok I really like the radio feature of this phone.  I was wondering if other people are having lag time when switching from one radio station to the another?  I will click on the radio station screen gets the little load circle and screen goes black then you have to wait and sometimes it will not load and goes back to the list of radio stations. I was wondering if other people are having serious lag time or if there phone switches easily from station to station. The bars are good so I know I am getting a good signal.  Also sprint need to work on the screen.   I wish it would go dark and the radio still work.  If I want the info just touch screen and it pops back up.  It gets hot when it is in my pocket.  Just some ideas.  I want to cancel my xmradio service and use this in my car.