I know very little about Swedish hockey, obviously these stats are ridiculously good, but HockeyAllsvenskan isn't the top league in Sweden. How much weight should put into this performance? I don't think many top goalie prospects play in HockeyAllsvenskan at 21 years old.
To recap.. Jonsson's current record is GP 12 GAA 1.35 SVP .941 SO 4 and 11-0-0. His partner is 32 year old Lars Volden who has GP 18 GAA 1.94 SVP .911 SO 1 and 10-7-0. Their team is one of the best in the league.
I did a quick search of HockeyAllsvenskan goalie stats for the last 15 years. Not much compares to Jonsson's stats. None of the top goalies finished with a GAA better than 1.35, and you have to go back to 2012-2013 to find a better save percentage. During the 2012-13 NHL lockout, 31 year old Victor Fasth posted GP 12 GAA 1.68 SVP .942 SO 1. I expect his team wasn't nearly as good as Jonssons, his record with the team was 4-7-0. Fasth in that same year posted GP 25 GAA 2.18 SVP .921 SO 4 for the Ducks.
Interestingly, also in 2012-2013 a 21 year old Anton Forsberg posted GP 33 GAA 2.04 SVP .933 leading his team to a 24-9-0 record.
I also didn't know this, but Filip Gustavsson would have been 23 years old in 2020-21. He played in HockeyAllsvenskan and posted GP 19 GAA 2.30 SVP .919 SO 1. That same year he post GP 9 GAA 2.16 SVP .933 in the NHL for Ottawa.
I did a deep dive on this before and found most successful Swedish goalies his age were already in Elite League and posting very good numbers there, but here are some historical comps for Jonsson as it relates just to Allsvenskan:
Jonsson (Age 20/21)- 11-0-0, 1.35 GAA, 0.941 Sv%
Ersson- (Age 19/20)- 27-9-0, 1.95 GAA, 0.933 Sv%
Forsberg- (Age 19/20)- 24-9-0, 2.04 GAA, 0.933 Sv%
Soderblom- (Age 20/21)- 16-14-0, 2.38 GAA, 0.924 Sv%
Gustavsson- (Age 22/23)- 11-7-0, 2.30 GAA, 0.919 Sv%
Johansson- (Age 20/21)- 24-17-0, 2.39 GAA, 0.913 Sv%
So he's tracking ahead of some okay names on paper, but it's hard to tell since Ersson and Soderblom aren't finished products yet either. Ultimately the best sign will be how he does at the next level, but if that's not in the cards over there either through promotion or a loan I would rather get Jonsson here at the end of the Swedish season and see what he can do in the AHL. He isn't going to develop much staying in Allsvenskan.