Windows 8 Store - Lag / Unresponsive

Are people noticing really bad lag from time to time (or all the time) when navigating through the Windows 8 Store or is it just me? Is this a server issue or is it a client issue and if widespread, can it be fixed with an app update (although, i'd imaging if it's a STORE app issue, it would require an update through Windows Update rather than an app update.)