No. It is about week 41, depending on the exact day of the week the year starts on. In 2011, when the question was asked, the 1st of October was in week 40 and the 2nd to the 8th was in week 41.
2011 starts on a Saturday.
October 8, 2011 is a Saturday.
October 7, 2011 will be a Friday.
October 16, 2011 was a Sunday.
October 28 2011 is on a Friday.
October 12, 2011 was on a Wednesday.
October 15, 2011 will fall on a Saturday.
October 21, 2011 fell on a Friday.
October 6, 2011 will fall on a Thursday.
October 18th, 2011 fell on a Tuesday.
It was a Tuesday.