The Census Bureau Current Population Survey has good data. Their income statistics page here
Income Statistics - U.S Census Bureau
Here's a table with income distribution and home ownership breakdown by age
PINC-01--Part 1
The BLS Consumer Expenditure Survey is also rich in data for this type of analysis. See it here
Consumer Expenditure Survey I can't link to specific data points but
Table 4500. Selected age of reference person: Average annual expenditures and characteristics gives a very detailed breakdown of income and expenditure by age group.
That's good stuff. (I think lots of people could use the CEX for personal budgeting.)
I can see that the median income for married couple families, ages 70-74, was $48,443. (From other sources, maybe $28k of that is SS.)
FINC-02--Part 10
Then I can see that about 75% of two person households ages 75+ owned houses without mortgages, (60% for ages 65-74).
And the market value of those houses was over $200k.
ftp://ftp.bls.gov/pub/special.requests/ce/CrossTabs/y0910/sizbyage/atwo.TXT
I'd estimate from other sources that the median couple had an income of about $70k when they were working.
So that gives a 70% replacement ratio, with no more mortgage payments for the median.
When I compare detailed spending in the CEX between the 75+ couples and all couples, I see reasonably comparable spending.
The older people spend less on housing (no mortages), taxes, and transportation. But, more on health care.
That totals up to no "crisis" in retirement for the average retired couple.
But of course that doesn't say that people who are currently 60 can expect the same result. And, it doesn't say anything about the extremes.
The NYT article is about a well-above-average worker who might retire on just SS plus home equity. I'd like to see a 2x2 table for 60 year olds that addresses that.