Se pare ca Sony cand se referea la "50% smaller in size" si "40% lighter in size" pentru PSP Go, nu il compara cu PSP 2000 sau PSP 3000, ci cu Fat (PSP 1000). E usor de verificat:

PSP-1000, 170mm x 74mm x 23mm, 280g
PSP-3000, 169.4mm x 71.4mm x 18.6mm, 189g
PSPgo, 128mm x 69mm x 16.5mm, 158g