I think it's more over-confidence than anything, but it's nice to see that the Clippers Front Office is "at least" realizing that they will have to spend money on him if they want to contend, and sell tickets, merchandise, etc. I think they want to pull off an extension much like OKC did with Kevin Durant, before free agency even happens.
http://basketball.realgm.com/src_wiretap_archives/71242/20110120/clippers_guarantee_griffin_wont_leave_via_free_agency_in_2014/
Here is the same guarantee, phrased slightly differently:
I guarantee that Donald Sterling, who is:
a. the consensus worst owner the league has ever seen, as well as a horrible human being by most accounts;
b. the man whose draft history includes 22 top 10 picks, exactly one of whom has been to an All-Star game in a Clippers uniform;
c. the man whose greatest free agent signing in 28 years is Baron Davis, despite being in the most attractive FA destination city in the NBA - the same Baron Davis who promptly submitted the worst two seasons of his career;
d. the man who drafted Lancaster Gordon, Benoit Benjamin, Michael Olowokandi and Melvin Ely above John Stockton, Chris Mullin, Dirk Nowitzki, Paul Pierce and Amare Stoudemire;
...that Donald Sterling will not do any number of 10 things like those above to make Blake Griffin run like the wind the second he hits free agency.