Addresses comments in #39

src/site/documentation/multi-device-layouts/rwd-fundamentals/index.markdown

@@ -83,11 +83,11 @@ how to control the page's dimensions and scaling.
 {% include modules/takeaway.liquid list=page.key-takeaways.set-viewport %}
 
 In order to attempt to provide the best experience, mobile browsers will render
-the page at a desktop screen width (usually about 960px), and then try to make
-the content look better by increasing font sizes and scaling the content to fit
-the screen.  For users, this means that font sizes may appear inconsistently and
-they have to double-tap or pinch-zoom in order to be able to see and interact
-with the content.
+the page at a desktop screen width (usually about 980px, though this varies 
+across devices), and then try to make the content look better by increasing 
+font sizes and scaling the content to fit the screen.  For users, this means 
+that font sizes may appear inconsistently and they have to double-tap or 
+pinch-zoom in order to be able to see and interact with the content.
 
 {% highlight html %}
 <meta name="viewport" content="width=device-width, initial-scale=1.0">