Yes beleive they will do it under the perfect scenario but it is a low probability endevor to use only a dry fly presentation all day for them. I keep a few skater types with me mainly muddlers if that scenarios presents it self. I imagine MS could put us into scenarios with a better proabaility of success.
For me it is mainly streamers, nymphs, and speys on the sink tip spey set up. Sometimes I think I should change my cyber name to DREDGE or NYMPHER something like that. Been nymphing for 42 years now!