I did a quick test on haste (figuring 20% as opposed to 25% should be noticeable).
11 attack rounds using a stopwatch (10 effective delays). MNK/DRG + destroyers with up to 30% equipment haste.
30% haste: 44.0 seconds => 264 dly (expect 243 dly w/o haste cap)
25% haste: 43.9 seconds => 263 dly (expect 261)
22% haste: 46.1 seconds => 276 dly (expect 271)
20% haste: 47.2 seconds => 283 dly (expect 278)
Granted there's potential for lots of error here but so far to me seems like cap is still 25%.
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