Got a source on that? I haven't heard that
I think each perk gets a unique knife and grenade, but they start with one of their tiered weapons, not specifically a pistol
e.g. medic - medic pistol, zerker - machete, firebug - fire axe? flare pistol? Should be interesting to see what some perks start with, especially demo
Explosive ammo would be pretty kewl.
I'm pretty sure each perk starts with their weakest weapon tier. This could be things other than pistols.