Fafo Institute of Applied International Studies has recently (today) released a small poll from the Gaza strip where about 900 respondents were asked questions regarding the Israeli withdrawal.
Interesting reading: Gaza Poll
"At last, it seems, Palestinians consider that they have a reason to celebrate a victory. In a recent poll, as many as 61 percent of respondents in the Gaza strip hold that Israel withdrew from Gaza because of the Palestinian struggle, and 23 consider that it became to costly for Israel to stay. Only 12 percent say that the withdrawal was a result of international pressure."