Yes and no. Since I live alone, I'd rather have smaller sizes than bigger prices on some things. restaurant portions and M&Ms, for instance. On the other hand, a pint is a pint. 14 oz. instead of a pint really annoys me.
I was noticing that the Beefsteak rye bread is much smaller than it used to be. I mean, those slices are now dinky! And once Thomas's bought out Sahara pite bread, boy did the downsize it. So now what are you to do if you actually want to stuff a piece for a pocket sandwich? Wegman's (East Coast supermarket chain) has downsized their brand of pita bread, too.
Peanut butter jars have been getting smaller for years. I griped not long ago about the minuscule boxes of cereal they're selling now. Only a week's worth of cereal!