I updated to 7.8 on my Lumia 900 a couple of days ago. Since then I have noticed that all the tiles on my home screen have become slow to respond. The time lag between the small visual motion that confirms when you touch any icon and the corresponding app launching has increased. This process was much faster on 7.5. Now I feel like I have to wait for ages between clicking on the Email tile and the Inbox actually opening. Anyone else experience this ?