Hello I having Experience of 4 years and more then 250 Drupal Projects.
It takes just 10-15 hours to convert a Joomla to Drupal site.
A Regular Contributor to the Drupal Community([login to view URL]). My work will ensure it looks same in IE7+, Firefox, Chrome, Safari and in Opera with 100% w3c complaints and Search engine Friendly. Please Check My Portfolio. Thanks.