Kyle Orton is currently facing competitiong with Chris Simms. Let's make a comparison first.
Kyle Orton, played 2 full season repectively in 2005 and 2008. His best record was in 2008, with over 2,900 yards, 18 touchdowns and 12 interceptions. In total he has passed for over 5,300 yards, for 30 TDs and 27 INTs in his career.
Chris Simms, as son of Giants great Phil Simms, was considered talented player. His best record was in 2005, when heplayed 10 games for the Buccaneers, with a record of 6-4, passing for over 2,000 yards, 10 touchdowns and seven picks. Not really good enough for an NFL QB. In total, he passed for 3,000 yards, 12 TDs and 17 INTs.
We can see easily that Orton has more advantages than Simms. So it is more likely for him to be the Broncos starting QB.