I have a hard time noticing it too... I think unless your guys are fast to begin with you won't see it... they'll use all their movement for first round of quick, then attack. Also make sure your guys are actually blessed (the candle in their description will be lit up). Nifel giants... you'll notice when they're quick
quickness is noted in your stats under attack rating, etc.
I gave a pretender a w10 bless to test it - units get a +5 defense rating, but no note of quickness appears anywhere. If I bless commanders they seem to get quickness (noted under attack rating).
The quickness you get from W9 doesn't give you any extra defense or attack far as I know; there's only the regular W8-effect of +4 def. (Or +5 from W10 in your example.) Are you sure you've observed the W9 blessing giving a bonus to attack on a commander?
Edit: Oh, and you can always check the unit's APs. They should be 1.5 the base value when the unit's blessed.