Man, you need to get over the fact that he once had a good game in a pre-season friendly, and that he once played well against a newly promoted QPR side. Saying he is brilliant based on those two games is every bit as stupid as the people who say he won't make it based on the numerous mistakes he has made as an inexperienced teenager playing in one of the best leagues in the world.
I can remember Danny Cadamateri skinning the Liverpool defence with ease before banging in an 18 yarder, but he turned out to be crap! I can remember Michael Branch being lauded as the next Robbie Fowler, but he turned out to be even worse than Cadamateri. It happens at other clubs too, I'm nowhere near convinced that all this hype surrounding Sterling at the RS is close to being remotely justified, although I'd say he has shown more than Barkley so far.
The fact that you think he put in some kind of noteworthy performance at Stoke should give people an indication of where you are at with this one. You're blinded by the hype, and you'd make out he was a wonderkid if he took a decent throw-in. He isn't ready yet, and there's absolutely nothing wrong in that!