IR is right on. reit investors have been betting on near-term growth to justify ridiculous valuations. blackstone got a lot of praise on their buyout of EOP, by quickly flipping the desirable assets at a premium. but in actuality all they really did was cover their initial investment by selling off the good stuff (midtown manhattan, OC/LA, sf, etc). now they're left with the filler and it remains to be seen whether they can make the deal profitable in the long run. all the other institutional and foreign buyers that pushed up asset values are long-term players and just like re_fan said, it'll be interesting to see how they fair in a downturn. most of the recent RE buyouts have not looked good. ASN, NXL, HLT (not closed)
re: yields -- i don't typically look at div ylds because a significant number of reits do not cover their dividend. nearly all of them will have a 10-yr track record of dividend growth though. its sort of like driving down a street and every store has a sign that says "LOW PRICES!" pretty much means nothing these days.
but bishie's back of the envelope comp makes a fine point -- there's no way these stocks should have yields lower than the risk free rate. even if you looked at reit 12-mo fwd earnings yld (4.3%), its still lower than 10-yr treasuries. on top of that, reits have actually been more volatile the the s&p over the past 3 yrs. so you have lower div and earnings ylds than the risk free rate and higher risk than other equities. only sounds like one way for prices to go...
(is there any way to post a graphs?)