Taking S&P's index into account and other indices like the US government's figures (OFHEO), the fact is that the US market is showing about 1% declines year on year? So it is not unlike our own market - basically flat overall but this masks more abrupt regional/local ups and downs.
There are many positives to the US market which the OP can be happy with - high rental demand, relatively high gross yields (eg. >6%), low cost per sq ft of property (e.g. can be down around €150 per sq ft compared to similar property costing €400 per sq ft here) and a strong economy.
There are of course negatives - high cost of prop mgt due to local property charges, community charges, insurance, letting and management fees; interest rates higher than the euro at present (>6%) etc.
So if you believe in the US economy, then the currency situation and the availability of good deals might make the timing of entry into the US market a shrewd move.