How are the springyness of those White Alps?
it depends, because not all white alps switches are created equal. for example, the white alps in my chicony 5161 are only about as 'springy' as the black alps found in dell at101's, whereas the (genuine) white alps in my focus 2001's are noticeably 'springyer'. as a result, i type substantially faster on the 2001's.
in the past i've cautioned against categorizing alps switches based on their stem colors, because it's not necessarily a guarantee that the internals are the same, unlike, for example, cherry switches. i have an alps glidepoint keyboard with white alps switches, but rather than being click tactiles like every other white alps switch i've seen, they are rubber damped soft tactiles. basically the same switches found in those silicon graphics keyboards, but with white stems instead of cream or beige.
The Black ones were pretty wimpy on the bounceback.
agreed, and it's one of the reasons why i'm not a fan of dell at101's.