Longer delay on standard grenades

I think the delay before a grenade explodes should be increased.
Why?? Simply ask yourself, how many times have you been able to throw back a grenade, without it just exploding as soon as it hits the ground?

My whole point is, that throwing back grenades is hardly possible, because the grenades explode so quickly, it should be not as long as BFV, but a bit shorter.
I mean i loved in BFV creating those Tom and Jerry moments, where they threw grenades into my room, and sat in cover and waited for it to explode, and me just throwing it back.
I really miss those moments...