woocommerce and admin-ajax.php page load speed issue

Hi,

I’m having an issue with woocommerce, as discussed here

http://stackoverflow.com/questions/22705185/load-time-issues-related-to-admin-ajax-php-with-pingdom-results-link

basically woocommerce appears to be using admin-ajax.php on every page and it adds a considerable delay on page loads with a wait time sometimes of many seconds.

Has anyone else come across that..??

I have a test site here http://www.bigon.com/ohc with ultimatum on it, and woocommerce enabled and if you run that through http://tools.pingdom.com/fpt/ you will see the considerable lag caused by woocommerce..and admin-ajax.php. This goes away when woocommerce is disabled.

Any thoughts on resolving that without resorting to the fixes in the article above which seem to take away from the functionality you would expect in a sitewide store..

thanks,

Iain