What is a young adult in the 2000's?

Ok so recently I checked out the new Charlize Theron movie Young Adult and it left me asking the ? What exactly is a young adult???in 2012...

I decided to do some research and devide this topic into 4 parts so here is what i found to be the case of so many"young adults" 

Lets start with Characteristics of 18-23 years of age:  

1. Trial and error 

2. Short attention span (easily accessible) 

3. Impatient 

4. Independent 

5. Beginning/training for jobs or careers 

6. No kids 

7. Low income 

8. Lots of roommates or living with parents 

9. Lots of free time for social needs or service 

10. Lots of work—college classes, jobs (more than one part-time or long hours at 

a full-time job) overwhelmed with responsibilities 

11. Some will experience unplanned pregnancies that lead to child support and 

child care issues 

12. Want authenticity from those in leadership positions 

13. Gothic influence 

14. Exploratory—Spiritual, identity, relationship 

15. Want to be loved 

16. Identity development—in relationship to something of value 

17. Relationship development—friends and marriage.  

18. Scared of Commitment—some seeking for love that leads to early marriages 

19. Need for community to be connected and included  

20. Want to be trained to share their faith 

21. Intimacy development 

So thats pt 1...Thoughts?