Mine are Horizon, the last thing the guy had left. They're supposed to be similar to Cascade as far as usage goes, but I haven't found any information about yield.
Cascade rank at the top for yield, so that partially explains why your plants are doing so well.
As far as water goes it's been raining so much here in Maine I feel like I'm back in Oregon, so that isn't the issue.
I never expected to get anything useful until the third year anyway, so I'm not disappointed.