That's true - they really don't shed much (on furniture/carpet), and the undercoat just hangs in with the rest of the fur and has to be raked out. If you don't get it out, then it will eventually clump and mat, and that's when you have the problem. If you just groom her every couple of weeks, she should do great.
And if you get a slicker brush, make sure you get one with plastic pins and not metal. Those metal ones are too sharp. I personally never use one - just the rake and a regular steel dog grooming comb.