Is this a nexus?

[cryingbear]

I had an examination done in 2012 for bipolar disorder.  

The rater asked if my pre-existing condition was aggravated by service but the examiner didn't find evidence that bipolar pre-existed service and instead gave this opinion:

There is no evidence to support that the veteran: "cIearly and unmistakably" was diagnosed with bipolar disorder prior to his military service. Based on this C & P Mental Health exam and on the veteran's claim and on the available medical evidence; his mood disorder only became evident when he was first treated at Travis AFB for Dysthymia (a form of minor depression). One month later this diagnosis was changed to Major Depression.  Based on the above statement it can be said t.hat the veteran's mood disorder (bipolar disorder) was first manifested in the year 2004 when he began to have symptoms of depression and followed years later by having had a manic or mixed episode.  The diagnosis of bipolar disorder cannot be made unless the person has one or more episodes of mania, hypomania or mixed in addition to having a history of recurrent major depressive episodes. It may take years for the full condition to develop. Therefore bipolar disorder is chronologically related to his time in the military. 

The examiner didn't use the language "at least as likely as not" but used "based on the above statement it can be said" and stated without the words "at least as likely as not" chronologically related to his time in the military, will opinion be okay for a nexus requirement?

The rater didn't reopen my claim because there was no evidence of aggravation and the examiner didn't give an opinion on aggravation. 

My claim is currently waiting DRO Review.