I'll provide the dialogue that triggers when you go with Lyssabel to the six locations on the island:
Mear's Farm
"Though the crops come and go with the season, these fields, orchards, and arbors have been here longer than the city of Stormwind."
The Outer Banks
"In his logbook, Faldir expressed relief to find safe harbor here. This isle became a crucial foothold for the humans who first settled the south."
Small Aerie
"The locals have dubbed this hill the Small Aerie. Flocks of Gryphons naturally tend to roost here."
Gilded Oaks
"The beacon on the bluff is one of the island's most historic landmarks. It is the first light seen by ships bound for Stormwind Harbor."
Brumewood Hollow
"The island's burial roll has been meticulously kept. Over fifty generations have called this place home. It is a fascinating read."
Cliffside
"The island's earliest register mentions an amnesiac Dwarf found in the surf. Though his true identity is lost to us, this bridge he built serves as his legacy."
From this, we can extrapolate that Founder's Point is:
- Older than Stormwind City that 50 generations of people lived here.
- Managed to survive The First War unscathed