"The interesting point is how little is actually being raised and how much of that is being retained," he said. "Obviously Quadrant has adjusted the issuance to reflect market conditions," he said.
"That is appropriate and you would expect that from anybody raising capital at this point," he said.
The source said he expected Australian media company Fairfax, which has said it plans to float off 30 to 35 per cent of online trading platform Trade Me, to also scale back its offer if uncertain market conditions continue to dog the markets.
Summerset was once owned by AMP Capital Investors, which sold the company in 2007 after an abortive attempt to float the company, said the final price of the shares will be announced on October 7.
A retail offer for the shares will open on October 10 but there will be no public pool.
In addition to selling down its stake, Summerset will raise $50 million of new capital to accelerate growth.
Summerset's recently appointed chairman, Rob Campbell, said market feedback indicated keen interest in the offer.
"Summerset is a quality business with very favourable underlying demand drivers and, as a result, good growth prospects," he said.
The company has been compared to listed retirement village owner, operator and developer Ryman Healthcare, although the two occupy different segments of the market.
The number of people aged 75 plus is expected to nearly double in the next 20 years.
The company has forecast pro forma net operating cashflows of $51.9 million and total investment properties of $632.6 million for the financial year ending 31 December 2012. Summerset, the country's third largest retirement village operator, expects to list on November 1.