Not at all. It didn't get very big but I loved the soft 'lambs' ears' leaves. I think they are dwarf varieties. I much prefer them to the standard foxglove leaf. The silvers do seem more like princesses, but so beautiful! I wondered whether the silveriness means they would prefer more sun (as silver plants often do.) I couldn't find out.
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In the sticks near Peterborough
http://norfolkcottagegarden.co.uk/shop/item/Digitalis-purpurea-subsp-heywoodii-Silver-Cub_foxglove