We caught word just a few days ago that Samsung might be considering this leapfrog move for not only the Note II, but also the Samsung Galaxy S III as well. The move makes sense since Android 4.3 is certainly right around the corner and now that Samsung has a Google Play edition of its flagship Galaxy S4 on the table, it is going to apply considerable pressure to keep its other devices up-to-date.
Abandoning the 4.2.2 update also frees up resources to concentrate on the Android 4.3 and presumably later down the road, Android 5.0 which these devices will be the beneficiary of. The main culprit at hand is TouchWhiz, which puts a significant skin over stock Android and with the new features introduced with the Galaxy S4, requires significant testing and approval from carriers as well.
In other news related to the same support page, the Nokia Lumia 920 can expect to see the GDR2 update around August 14th if all the testing goes well and keeps things on schedule. The Windows Phone 8X and 8S by HTC should also see updates next month.