CMS unknown

Hi,

one of my future customer told me he uses WordPress. As i’m new to WordPress i would like to get from you confirmation that it’s true and to know the version of WP+theme he could have.

He just sent me a simple login screenshot that you can find on:
https://i220.photobucket.com/albums/dd277/alainroger/cms-login.png

i’m a little bit surprise because it doesn’t seem like WP login windows.

thx.