Hey there, regardless of where your jungler starts this season, you should never get to lane late. I am able to effectively leash my jungler from the new Golems or Gromp without losing a single creep.
Your jungler gets his jungle buff from the second that he smites the creep. He should smite immediately and you should help with auto attacks until it is at least down to 25% HP (I stay till it's at 10%).
If you do this and then walk into lane, there's no possible way that you can be late to your lane or miss a single creep or any XP unless you are extremely unlucky with the minion aggro (they all shoot one target). Junglers should no longer be starting with their red, or blue buff directly as the buffs from the Gromp or Golems are too valuable to pass up before moving on to the other camps. They provide either faster clear speed or a stun which in both cases reduces total damage taken and reduces the number of potions your jungler needs to pop before he has to go back.
I'm gold II and I can tell you that if my jungler messes up and threatens my lane due to a late smite, or trying to start blue/red for some reason, I will leave him to his own devices unless it's an attempted invade. The level 2 in lane is extremely important for an ADC and I'd say it's more important to establish your lane early than for the jungler to have a perfect leash.
IF YOU DO END UP IN LANE LATE SOMEHOW. The enemy ADC will have pushed your wave more than you it's unavoidable and it's just how the game works. If you missed 1 creep, you'll lose your lvl 2 advantage but you will also be able to freeze the lane closer to your turret and farm safely from here where even an all-in from a level 2 leona with ignite will not kill you or force you from the lane.
If you want me to analyse any replays using op.gg to record them, you can add me in game on EUW or on Skype and I'll run you through exactly what you did or didn't do correctly.