Propagate Hydrangea in Water

About a week ago, I took some cuttings from my mother's hydrangea.  I'm trying to propagate them in water.  It has been about a week and I have not seen roots yet but I don't expect to for another couple of weeks.  I'll post pictures once the roots start to grow.
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Update:  It has been almost 3 weeks and I haven't seen any roots yet.  The cuttings still look good.  They aren't rotting or wilting so I'm hoping to see some roots soon.
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Update:  Three weeks to the day - one cutting has tiny roots.