Layman - very illuminating.
It's strongly illustrative of the trap that has been constructed from the 5GenTM mythology. As the author notes, he was flying in a USAF F-15D, a type that entered service at the end of the 1970s. In this scenario, the most important element of the "sophisticated EW system" was the ALR-56C RWR, a superheterodyne analog system...
http://www.baesystems.com/cs/groups/...aes_020003.pdf
...which understandably failed to detect the LPI radar on the F-22s. The F-22 radars, meanwhile, could be power-managed to match the humungous nose-on RCS of the F-15D (a basic LPI technique), exploiting jet engine modulation to obtain positive ID.
The F-15C/Ds, meanwhile, were individually blind unless each aircraft used its radar (lacking intra-flight datalink), so there was no possibility of using a trailing element to use radar. The digital ALR-94s on the F-22s would have picked them up as soon as they transmitted.
Finally, the F-22s had height and speed to give their AIM-120s (six per jet) enough launch boost to perform high Pk launches at range, so they could exploit any advantage in detection and tracking range. The F-15C/D does not have MAWS, as far as I am aware.
So now let's equip Blue with F-35s, with max four missiles, with less range.
The adversaries have RCS reduction (probably 20 dbsm below an untreated Eagle) that denies JEM and requires the LPI radars on the F-35s to run at much higher power, which makes the signal easier to detect. Red also has digital ESM, which operates on all frequencies all the time rather than scanning like an analog superhet. LPI has suddenly become far more difficult.
Red may also have IRST. If they use radar they can hop the transmission around the formation and share the data via datalink. Red has decent sensor fusion, too.
Red has MAWS, effective DRFM jammers and auto-evasion, all of which conspire to make a high-Pk shot more difficult and (other things being equal) reduce missile range and F-pole distances.
(But in 5GenTM land, this Red force is still just "4Gen" and grouped with the old F-15s.)
And finally, if it goes wrong for the F-22s they can disengage with their superior energy maneuverability, including speed and acceleration. On the other hand...
Historical note: The F-15 Aggressor unit was deactivated last year, while F-16 Aggressors have been carrying IRST...