As Alan stated, you are convicted. I posted a comment to Alans answers stating that he should read the law. Upon MY reading I found that sex offender crimes are can not be dismissed under deferred probation. All other crimes, when deferred probation is completed, are not considered a conviction:
"On expiration of a community supervision period imposed under Subsection (a), if the judge has not proceeded to adjudication of guilt, the judge shall dismiss the proceedings against the defendant and discharge him."
Here is where I messed up:
"The judge may not dismiss the proceedings and discharge a defendant charged with an offense requiring the defendant to register under Chapter 62."
http://www.statutes.legis.state.tx.us/Docs/CR/htm/CR.42.htm#42.12
See Sec 5(c)
Common sense right? When dealing with the law (which are made by politicians) common sense goes out the window. Case in point, a 17 year old can legally move out of their parents home because under the Juvenile Code they are not a "minor" but can not live with someone else other than certain family members because they are a "child" under the Penal Code.
https://www.texasattorneygeneral.gov/opinions/opinions/50abbott/op/2003/htm/ga0125.htm
http://www.statutes.legis.state.tx.us/Docs/PE/htm/PE.25.htm#25.06
It has been a long time since I was forced to learn something, which is why I answer on YA. With the help of Alans answer and my quickness to assume that people don't read the law (which is the case almost all the time) I did lean that deferred probation is a conviction for registered sex offenders.