Agreed that it definitely depends on the group of guys. Saying that any collection of YMCA stars could beat a WNBA team is likely selling the professional women short.
A high school team like this, however, would IMO win quite handedly over the Cynthia Cooper-led Houston Comets or the Lisa Leslie-led Los Angeles Sparks.
That's a photo of the 1998 Lakewood St. Ed's team featuring Sam Clancy (Southern Cal), Steve Logan (Cincinnati), Jawad Williams (North Carolina) and Steve Lepore (Wake Forest)
I'd also put that Winton Woods team in that category as well.