Olejnik faced the OF twice when he managed into the team. He conceded 3 goals against them, 4 less than Krul conceded in his 1st match against Rangers.
One team Olejnik didn't face that season was Gretna. Krul managed to let in a few against them.
You can take the stats for both keepers and make the case for and against. We won more games with Krul in goals but we also lost far more than when Olejnik played. One thing that can't be denied is we were a far better defensive unit in 2008 than we were in 2007. We might not have won as many games but cutting out the inexcusable defeats to the likes of Gretna and St Mirren had us pushing for the top 6.
The point I'm making is that, although Krul is a much better keeper, Olejnik was (and still is) a young keeper that Hughes fucked over more than once. He was in great form until Hughes folded under pressure from Magilton.
I'd be surprised if Pressley replaces Olejnik effectively.