This article claims:
Study of the Dead Sea Scrolls has increased the faith of Bible-believers. Why? Because they prove that the hand-copied texts that have come down from the Masoretic scribes are accurate. ...
... The Dead Sea Scrolls, discovered in the years 1947 to 1956, in eleven caves near Qumran, have answered that question. The Scrolls can be positively dated. They are 1000 years older than previously used manuscripts — and yet the text shows no deviation.
The Masoretic scribes who made the copies kept a remarkably accurate record.
A similar claim appears in this article:
The Dead Sea Scrolls are considered one of the most important archaeological discoveries of the twentieth century and perhaps of all time. They include 972 documents from approximately 300 B.C. to A.D. 70. Among them are over 200 scrolls of Old Testament writings, such as the famous Isaiah scroll, found in excellent condition even though it is 1,000 years older than any previous manuscript of the book. These documents have provided an abundance of evidence that has helped to confirm the text of the Old Testament is astoundingly accurate.
But it (2nd link) admits there are minimal differences, but doesn't say whether they are textual deviations or not.
The Dead Sea Scrolls can give us confidence in the reliability of the Old Testament manuscripts since there were minimal differences between the manuscripts that had previously been discovered and those found in Qumran.
Is it true that there are no textual deviations between the dead sea scrolls and the old testament?