From US forums OG poster https://us.forums.blizzard.com/en/wow/t/the-horde-cave-numbers/450188
Something I haven’t seen yet is actual numbers regarding the impact the Horde cave makes on a game, so I decided to time it myself. Times were done on an epic mount with a carrot on a stick, mithril spurs and riding skill gloves.
For the Alliance to reach Stonehearth GY’s flag from Stormpike Graveyard and reinforce it, it took 49 seconds. 10 people on the Alliance side can respawn at once at SPGY.
For Horde, from the cave to Iceblood Graveyard with the same mount speed takes me 21 seconds along the road. The Horde cave also respawns 20 players at a time.
If Horde cave pushes out 20 players at a time every 30 seconds and it takes us 21 seconds to reinforce IBGY, the Alliance can expect to have to fight those 20 players a minimum of 11 times (11.76, lets assume the .76 doesn’t make it in time) before they successfully capture IBGY. That is 220 HKs over the full 5 minute capture time.
Conversely, the Alliance graveyard is respawning 10 players every 30 seconds and those players have an additional 49 second ride to SHGY. The Horde has to defeat 7 (7.59) respawn waves of 10 in order to capture SHGY. Thats 70 HKs over the full 5 minute capture time.
Obviously you don’t always end up waiting the full 30 second respawn, but this is true for both sides and therefor equal.
I offer no bias and no opinions, just numbers. Form your own conclusions.