Here's the top 10 from the Norwegian championship:
1. Reidar Borgersen (Joker Merida) 1.01,55
2. Edvald Boasson Hagen (Team Sky) +11
3. Lars Petter Nordhaug (Tønsberg CK) +42
4. Lorents Ola Aasvold (Plussbank BMC) +1,55
5. Truls Engen Korsæth (Lillehammer CK) +2,17
6. Andreas Landa (OneCo-Mesterhus Cycling Team) +2,51
7. Bjørn Tore Nilsen Hoem (Plussbank BMC) +2,54
8. Alexander Randin (Ringeriks-Kraft Look)
9. Kjetil Johansen Amundrud (Oslostudentenes IK Sykkel) +3,03
10. Max Emil Kørner (Ringeriks-Kraft Look) +3,06
Compare to last year:
1 Edvald Boasson Hagen (Lillehammer CK/Team Sky) 1.03.06
2 Reidar Borgersen (Modum CK/Joker Merida) +2.01
3 Lorents Ola Aasvold (CK Nor/Plussbank Cervélo) +4.06
4 Vegard Stake Laengen (Asker CK/Joker Merida) +4.12
5 Stian Saugstad (Ringeriks-Kraft) +5.25
6 Geir Inge Berg (Sandnes SK) +5.47
7 Mikael Schou (Ringeriks-Kraft) +6.31
8 Andreas Landa (IF Frøy) +6.32
9 Vegard Breen (Joker Merida) +6.45
10 Max Emil Kørner (IF Frøy) +7.01
As you can see, Borgersen's gap to the other cyclist's has remained the same, so I don't think the explanation is that he did a great ride. The big difference is that Edvald seemingly has become 2 minutes slower (relatively, of course). It seems as if his form has completely vanished since the Dauphine. Or perhaps he was just feeling like crap since he just returned from altitude.