DS Game Titles (Theory?)

[Takahashi2212]

(Don't know if this is true or not, but it seemed like more than a coincidence to me.)
Some games on the DS used words that started with D&S so when the game is abbreviated, DS would be in the title.
Examples:
Resident Evil: Deadly Silence
Advance Wars: Dual Strike
Lunar: Dragon Song
Betty Boop's Double Shift
Bleach: Dark Souls
Castlevania: Dawn of Sorrow
Dark Spire
Dorabase: Double Sequence
Full Metal Alchemist: Dual Sympathy
Guilty Gear: Dust Strikers
Mage Knight: Destiny's Solider
Ninja Gaiden: Dragon Sword
Peggle: Dual Shot
Shin Megami Tensei: Devil Survivor 1 and 2
Tenchu: Dark Secret

You guys think this is just a stectch, or if it was intentional?