It appears on the system profiler as having the appropriate mA to charge:
iPad:
Product ID: 0x129a
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.01
Serial Number:
(DELETED BY MYSELF)
Speed: Up to 480 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfd500000
Current Available (mA): 500
Current Required (mA): 500
iPad:
Product ID: 0x129a
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.01
Serial Number:
(DELETED BY MYSELF)
Speed: Up to 480 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfd500000
Current Available (mA): 500
Current Required (mA): 500