Land units loading onto ships super fast?

[unmerged(3921)]

It is well known that land units load onto ships in a number of days equal to the number of days it takes to move into a clear land area, as long as the land units are in a port. This is 15 days for infantry, 10 days for cav, 20 days for artillery.

But (I am using 1.08, no betas) I have noticed that sporadically I can get land units to load onto ships in just 5 days. I can not replicate this but have seen it happen dozens of times in my GC game (not up to 1680). When this happens, it does not matter if the land units are artillery, infantry or cav - on one occassion I had two different armies loading onto a fleet, one army with cav and one with infantry and both loaded in 5 days.

Is this a bug, or are certain ports given "super" status with faster loading times?

 

[AndrewT]

Can't say I've ever noticed it, but I'm not sure I would. Anyone?

 

[kurtbrian]

I don't think I have seen it either

 

[EUnderhill]

Perhaps this is an effect of the straits code. Perhaps someone with a time surplus could check to see if this fast loading only happens in certain locations, you know, the ones involving straits.

 

[SonofWinter]

Maybe it is a grand naval harbour. You know, the gold ones. Maybe they give a bonus.