Changing CMS from WP to Drupal, will it effect rankings?

[md_dan]

Wordpress is just now a pain is the as*.

It takes a lot of time to load. To publish a single page article you will need atleast one hour to write, edit & publish.

And the update & upgrade option also seems to break every time. I don't understand if the CMS services going to fail every time then why give an automatic option in the first place?! The most disappointing part is that in previous times if you use any unnecessary plugin or have an outdated one then only wp would give you trouble. But now that's not the case even if you don't use any plugin still wp will give you a ton of problems.

So, we have decided to move to Drupal.

Changing CMS, will it effect thee present rankings? I am doing my best to keep everything same (url and all).