The Eurofighter and the Rafale don't have delta wings, if you look at them closely they resemble the F-16's wings more than anything and are nothing like the 102, or Mirage's wings. They could be considered a cropped delta wing(which is what it is called I believe), but that is not the same thing as a full delta wing and is designed more for high maneuverability.
I wasn't blaming Delta wings only, however the delta wing design is not ment for dogfighting. It is ment for very high speeds. The 102 and 106 along with Mirage's of the era were not very good dog fighters. The reason the mirage's could win(in the Israeli wars)is because the pilots had better training and they were more advanced. The Mig-21 can out maneuver and out climb a mirage III type aircraft, but the key was again better training and technology.