Jarkko Mattheiszen
The FU guy.
No, its not.
If you look again its actually two fingers that are open.
Edit:
Doh, didnt count the thumb.
Although its not the sign of blessing anyways, atleast not to any of the Abrahamitic religions.
Wikipedia:
The benediction gesture is a raised right hand with the ring and little finger fingers touching the palm, while the middle and index fingers remain raised. Taken from Ancient Roman iconography for speaking (an example is the Augustus of Prima Porta where the emperor Augustus assumes the pose of an orator in addressing his troops), often called the benediction gesture, is used by the Christian clergy to perform blessings with the sign of the cross; however Christians keep the thumb raised - the three raised fingers (index, middle, and thumb) are frequently allegorically interpreted as representing the three Persons of the Holy Trinity. It was shown by representations of Jesus as Christ Pantocrator.