FTD uses local shops to arrange and deliver flowers, and they require the shop meet certain standards so you're assured of quality.
I've ordered from 1800flowers.com a few times as well as ftd.com, and FTD always seems to come out a bit ahead in quality.
Ordered a dozen yellow roses last month for my g/f and they were WAY better than the picture.
Great thing is, FTD's in-house service (i.e. flowers that have to be fed-ex'd) is excellent too. Just today, my g/f received a vase of orchids from me, and they are BEAUTIFUL and packaged nicely.
Thing is with fed-ex delivery for any flowers you gotta order a couple days in advance, but if you use FTD online with a local florist, you get SAME DAY delivery if you order by 2PM. Not a bad deal.