WordPress.com developers have announced that they have boosted the loading time of site specific stats.

This is also applicable for users of their Jetpack plugin pack that is available to users of WordPress.org powered blogs.

The developers said:

This loads your whole stats page two to three times faster, which means less time spent staring at a spinner and more time for interacting with your readers and creating content.

WordPress.com developers have also made it easier to interact with the notifications on the platform. You now have a bunch of keyboard shortcuts available:

n : Open/Close the notifications menu (make sure you aren’t currently typing in a text box first).
j / k (or up and down arrows) : Navigate through your notifications
r : Start replying to a comment notification.
a : Approve/Unapprove a comment.
s : Mark as Spam/Unspam a comment.
t : Trash/Untrash a comment.