Hello,
Please check this site http://www.webpagetest.org/result/150512_G0_P5Z/1/details/ , you’ll see that slow loading is caused by your images. You need optimize them.
Please follow the suggestions from these articles:
http://codex.wordpress.org/WordPress_Optimization
http://techtage.com/speeding-up-wordpress-sites/
http://www.sparringmind.com/speed-up-wordpress/
Thank you.
Regards,
Eva Kemp.