Adjusted text positioning 

Here are some adjustments regarding positioning of text. 

Please have a look at this side by side comparisons:
Current implementation: http://jsfiddle.net/franatique/URwG8/
Adjusted implementation: http://jsfiddle.net/franatique/URwG8/1

See also: http://www.w3.org/TR/SVG/text.html#TextLayoutIntroduction