I do not know. I am not sure if there is anything published yet about the Gripen in dissimilar counter-air missions. Would be very interesting, but then again even about the Typhoon there is little known yet about its true capabilities, not to mention the F/A-22, the best we get is that both perform beyond expectations and they beat the F-15...well they should do that, don't they.
But last year we interviewed a former Viggen pilot, who now flies the Gripen. I don't know for sure yet, but in cooperation with Patrik (Viggen as you know him) we might be able to ask him some questions about the Gripen in the near future, of course weapon system and performance details can not be revealed. But we might get some answer on what the pilots think about the aircraft's power and manoeuvrability.
It's important to remember the origin of the letter, which is the engine manufacturer, not SAAB, not FMV (Swedish defence material administration). not the air forces operating the type. But the EJ200 on the Gripen is not impossible, we can tell from this, however they need a customer. Valiant1? Gripen? Viggen? Any requirement, guys? What if all three of you start a display team, then we could have at least three EJ200 equipped Gripens in the world.