Somebody has to be right given the extreme ranges from 1390 (1% loss) all the way to 1615 (14% gain).
Problem is that your stockbroker or financial advisor that works at one of these firms doesn't have to heed any of the advice given to them from the guys that make these targets, not that they should either.
Brokerage firms are smart, they promise nothing and deliver less. Your financial guy can invest your money pretty much as he or she sees fit and this is great for the brokerage firm because it smoothes out the edges and the commissions and fees keep coming in!
Just remember that it costs money to have someone 'watch' your money. And even 1% adds up over time. You can and should invest by yourself and for yourself.