Join Date: Aug 2009
Location: New South Wales, Australia
You don't quite know what you are going to get with a crossbreed. Like Featheredfeet said, horses vary enough within one breed, and when crossed with another there can be massive differences. So it's hard to comment that.
Saying that, the crosses I have seen tend to be quite heavy where as eventers tend to favour lighter, faster horses. The ones with more Thoroughbred, like 3/4 bred, tend to be more popular.
I also, personally, tend to question to wisdom of such crosses as performance horses. While there are many great heavy horse crosses as pleasure mounts, or for low level competition (and there are the occasional ones in upper levels). The reason for this is that percherons, and heavy horses don't really possess a lot of the attributes that are sought after in eventers, where as a TB has these attributes, or even a warmblood cross, or another performance cross.
I once had a 1/4 Clydesdale x TB and she had a great nature and was athletic enough to be a low level all rounder.