Hello, was wanting to know how noisy these pickups are ans I've been reading that Gibson P90's are noisy and wanted to know if the Seymour Duncan's are quieter?
Are you talking about only P90s? Single coils will always be subject to some noise. Many Duncan models are made to vintage specs, so subject to the same noise the originals were. But they also have offerings with noise cancelling coils, etc. for those that have a problem with noise.
They are quieter than most normal single coils. The noise from any single coil design will be present, and I don't know if any non-hum cancelling P90 is more noisy than other ones.