Although grammatically correct, the em dashes used on the welcome screen template are distracting and almost read as a bullet point.  My personal feeling is that they take away from the overall message of the screen.

Couple thoughts:

1. Use parentheses in place of em dashes.  Still gramatically correct and perhaps feel more conversational (which is the overall tone we are trying to establish based on the new guidelines).

http://en.wikipedia.org/wiki/Bracket#Parentheses_.28_.29

2. Remove the space btwn where the em dash starts and ends on the letters.  This at a minimum would call less attention to the phrase. 

http://en.wikipedia.org/wiki/Em_dashes
eg./
The em dash (—), or m dash, m-rule, etc., often demarcates a parenthetical thought—like this one—or some similar interpolation.

I realize this is late in the game, and very minor, but they are killing this screen:)