And just to provide some context...
Moss' first 2 seasons:
Season 1: 2 catches for 40 yards, 0 touchdowns
Season 2: 30 catches for 433 yards, 4 touchdowns
It wasn't until Season 3 that Moss exploded for 74 catches, 1105 yards. That doesn't mean that Robinson will follow that trajectory. It's highly unlikely (not only because great WRs don't come along every day, but also because he's going to get less opportunities in 2014 and beyond because of his competition, not more). But it does demonstrate my point that calling a WR a failure before even their 3rd season has begun may not always be wise.