Are these ladies actually carving or are they linking turns. Carving is a special kind of intermediate-advanced turn that a lot of people confuse with just linking turns.
The B-Pro is an excellent board, but I wouldn't consider it an easy-to-turn board. It's pretty stiff and Gnu's most aggressive female model.
For out east, I definitely recommend a board with magnetraction or vario grip (Never Summer's equivalent) for those ice and hardpack kind of days.
For Gnu, I would recommend the B-Nice. It's geared toward progressing riders, but it's not a totally soft board.
Roxy also makes some killer boards with tech similar to Gnu (magnetraction and C2BTX). Check out the Eminence (the 2010-2011 model) and the Ollie Pop.
I would also recommend the Never Summer Pandora or the Infinity. I love the Pandora because it's a softer freestyle board, but it has the vario grip and dampening, which makes it stable in choppy conditions. The Pandora is the softest of the boards mentioned here. The Infinity is another excellent board - it will go all over the mountain and last your ladies a long time.
Boards go on sale in late February and early March. If you need longer sizes (high 140's and up) you'll probably have a lot of good decks to choose from, but you should buy as soon as they go on sale or you'll miss out.
Other solid boards for beginners without magentraction: Capita Space Metal Fantasy, Rome Vinyl, K2 Luna or Lunatique, Ride Compact.