Don't get too excited. Unsolicited pinkie isn't very much better than grey. The advantage of the former is MMs can display other customer orders. This helps when entering your own. On greys, all you have is time and sales. Buyers and sellers have to find each other w/ blindfolds on. This can lead at times to wide spreads and wild price swings.
NSS diehards here should love either one because MMs aren't allowed to naked short.
----- "We simply attempt to be fearful when others are greedy and to be greedy only when others are fearful." -- Warren Buffett
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