I ride to the grocery store and do other errands on my bike while wearing jeans. Levis are the least comfortable, though. They have that heavy seam down the center that makes riding in them uncomfortable (IMO). Maybe these will be different if they're "performance stretch fabric", which just makes me think of super-tight punk rocker stretch jeans that look uncomfortable to begin with.
I can't wear "skinny" anything, so I guess it doesn't much matter.