MINNEAPOLIS (AdAge.com) — Summer reality TV is the video equivalent of a summer fling: A lot of fun, nothing heavy and a defined break-up date at the end of the season. The formula has worked wonders for NBC's "America's Got Talent," Fox's "So You Think You Can Dance," CBS's "Big Brother" and ABC's "Wipeout." And viewers seem particularly willing to date around with relationship reality, like last night's "The Bachelorette" finale and week two of "Dating in the Dark" on ABC.