Kimi only done 3 test with sauber!! In his first test, he only done 5 laps and call it for a day because his neck cant stand it anymore!! Sauber said he didn;t even bother to look at telemetry and sign him up immediately !!
That didn't happen like days before the season started, though. He still would have gone through the schedule of preseason tests, which was much more full than what we have now. His race experience was low, but he would have had a decent amount of time in the car before the season started.
Anyways, Raikkonen's performances were more impressive at Sauber in my opinion, but F1 was different back then and its hard to compare. Perez will impress me more when he beats Kobayashi more consistently or can perform consistently well in normal races on a normal strategies. I've got nothing against him, truly. I want to see him do well, but he's not done enough for a top ride yet in my opinion. Front running teams wont be gambling on alternate strategies that often, so he'll have to do his work straight up and I dont think he's done that enough yet.