The money quote here is from twin researcher Nancy Segal: "Before starting her research, Segal would not have been surprised if each young man tested similarly

The money quote here is from twin researcher Nancy Segal: "Before starting her research, Segal would not have been surprised if each young man tested similarly to his identical twin, despite their different environments. But her preliminary results, she said, show that on a number of traits, the identical twins were less alike than she initially anticipated. 'I came away with a real respect for the effect of an extremely different environment,' Segal said."