Yep,  all our Joomla! extensions  (components/modules/plugins) implemented based on native Joomla! API.  We do not adapting old applications, we implement it using all updates and changes in Joomla! framework. We do not use any hacks in our classes/structures/styles. All versions of our extensions for Joomla! 1.6 / Joomla! 1.7 / Joomla! 2.5 / Joomla! 3 implemented
as native component for every Joomla! version.