However, the British come every year in October.
On our past trips in October we also have noticed many british visitors but still had very low crowds. There have to be other factors that are causing the increase.
I'm sure the rescheduling due to hurricanes has some effect.
Also, people in general are discovering the lower crowds and nicer weather of the fall and hence, the growing popularity.
Disney has been marketing to this growing interest in the fall months by expanding MNNSHP dates, expanding F&W Festival from 30 days to 45 this year, etc. Then there is Super Soap Weekend, Festival of the Masters, golf tournaments and other conventions in Orlando that bring people into town.
And there is definitely a growing interest in trying "exotic" foods. Look at all the food programs and networks that have sprung up. People actually schedule their trips to coincide with the F&W Festival - I'll bet that wasn't the case with most people several years ago.
Even November is becoming popular - disney is changing resort pricing next year so that November is no longer "value" season but priced as "regular" season. Unfortunately, that gives us an idea of what is to come. (I'm not talking about Thanksgiving week which is always priced high but early November.)
The internet has greatly increased information to the masses and most likely helped alot of people to see the "perks" of going off season. It can't be stopped...lol
Someday we may not have any time of year that is still considered an "undiscovered gem".