If you happen to be in a place where there is slapback off the wall/building/whatever behind you, I think it's going to be mostly low frequency stuff and it looks like that rear lobe is only rejected by about 4db on the low end. The reality is I hear it when I'm walking around at a show, but I rarely hear it on tapes, even with omnis, so maybe it's not a real problem unless you happen to be in the worst possible spot... and if you are in the worst possible spot, don't blame the mic.
I predict a bigger issue will be weak bass response, which will make it unpopular with tapers. Look at the notes on the response chart... measurements are at 20cm=7.9", so response is flat for close micing, which I think means they are rolling off the low end heavily to compensate for proximity effect. That's the same situation as Earthworks cards like SR77, which I am very familiar with... crystal clear, but sometimes the low end is really thin when used as general room mics, it starts rolling off around 300hz at 1meter.