If anything they are a lot slower as there are so many riders, the many many people and horses and all the noise and commotion create a real buzz but this all rubs off on the horses so they tend to more excitable
i went out with them year before last it was great loads of people but it did split into a few different lots and as it's in the park you can always go off on your own and rejoin if it gets a bit much!! you will have great fun wish mine were sensible enough to go!!
I havn't done boxing day but donwe quite a few in the park, never had that much jumping but might be different tomorrow. (come over to our contry lots of jumping there)
boxing day meets are usually quite steady as it is a social meet and can have massive turnout...usually no jumping either...noes iv been on are usually short and steady with no jumping...pretty boring tbh...not gona bother next year...lol