Yes, true in US. Pain in the neck to estimate values and then back up your estimates, though.
I donate A LOT and tend to do one of three things.
1. Put a modest lump sum value on the stuff and hope for the best.
2. Save a receipt if the charity provides an accurate valuation (this is done for big ticket items only).
3. Write it off in my heart as tzedakah.
Guess which one Mr. A likes the least...