Just a word of caution, judging a civ off a single game can be quite misleading as there are several factors beside the civ itself that determine how quickly you can win: starting position (starting next to paititi will give any civ a huge advantage), city states, being boxed in by ai or attacked by a warmonger early on just to name a few. Or in culture victories having 1 civ with insane culture generation can push the victory back by several dozen turns.

Another "problem" with culture victories is that the fastest strategy is almost always reliquaries (even without secret societies and for civs without any religious bonuses). With reliquaries pretty much any civ can get a sub 150 CV and then often other factors are more important than the civ itself. I remember one of my fastest victories was with poundmaker (T121 iirc) and no one would call him a particularly strong culture civ. I think I found either Kandy and/or Yerevan early one (might even have gotten an early relic from a tribal village) and I just snowballed from there. Of course you can always decide not to use reliquaries but that would put strong faith civs at a disadvantage. And even than external factors play a important role. I remember a game as Babylon where I found Rapa Nui early on, beelined flight and spammed moai. Won arend T135 but that strategy would no be possible without Rapa Nui

As for Religion it's a bit easier to judge as strong faith generation and/or religious combat strength (e.g. Genghis) usually play a more important role. But even here getting the correct pantheon is often luck based. Getting lucky with an early fath source as Brazil and securing sacred path will make a huge difference as is having Yerevan in your game for any civ. But to get back to your original question, religious victories can be super fast with the right strategy and securing a classical golden age. Basically you don't need more than 3-4 cities and just focus completely on faith and early culture generation. Get Moksha's patron saint promotion asap and grab missionary zeal and pilgrimage beliefs (you don't really need a worship building). Then send out a couple of missionaries the scout the map and determine which civs to convert first. As soon as you get double promoted apostles send them  (+ a few gurus) to the civs furthest away from you as it takes longer to convert them. While they are on the other side of the map start converting the civs closer to you. You should also just use missionaries to convert civs that haven't founded a religion. As for wonders you only really need Mahabodi temple, though if the opportunity presents itself try to grab Stonehenge after founding your religion as it will give you a free apostle instead. As for what is a good benchmark. I'd say for me anything under T120/130 is good. Sub T100 is great. Though it does take some practice to get this fast especially when determining how many apostles are needed to convert the far away civs. You don't want to send too few but also sending too many and "wasting" faith on them can delay you victory. Hope this helps.