I have a paranoia about lateness, so I tend to be early and would prefer guest be early rather than late. If they are late, I fear they just wont arrive.

I grew up catching public transport, so I could just not be late in leaving otherwise I would miss the bus. Also relied on a lot of lifts, so it was the height of rudeness to now be ready when they turned up. So even now I tend to get ready early and that in turn leads me to be early.

Add to that I am very aware that a trip does not always take the expected time. Traffic jams, road works, difficulty finding parking, can make people really late, so for me I tend add a bit of leeway in that time. I found when I first moved to this area I could be very early or late, as I struggled to judge how long it would take me to get somewhere.

So overall, I find late more rude than being early.