Welcome to my blog, and to the world of Drupal and Opensource.
Let me share you my experience of installing Drupal using Drush.
Drush is preety awesome command line tool for Drupal developers.
If you haven't already installed Drush check http://drupal.org/project/drush
One of the great features of Drush for Drupal 7 is you can do a brand new site install with two simple commands. First setup a MySQL user and database, and note the username and password.
Then run the following, making sure to replace the user and passwords names for your local setup:
drush dl drupal-7.x