We're working with a cyclist who holds U.S. human speed records and recently broke world records in practice (documented, witnessed, videotaped, GPS data, etc.). When the winds are right and track time is available he will readily take both the "race of truth" (one hour for distance, record: 56 miles) and top speed (record 82 mph). He's working/practicing nicely past both records. The point is this guy's got legs.
His cycling has not prepared him for air squats, however. (Understatement)
His cycling has left him with an "inability to cope with even body weight eccentrics" and he sees this as the "apparent result of narrow "pure concentric" training regimen".