Jermain Defoe led the way with a hat-trick with Fredi Kanoute and Robbie Keane also on the scoresheet in our most impressive performance of the season.
The win took us up to seventh in the table on Saturday night and handed another packed Lane crowd the perfect early Christmas present.
Head Coach Martin said: "We've had three cleans sheets, so that has given us confidence and now this, if you score five goals you grow a bit.
"Our attacking play was good, we created chances so we're happy and I hope we can go on in the same way.
"The Premier League is tough but if you have a squad of good players and you grow in confidence then you can get results.
"A couple of weeks ago I said 10th or 11th place would be good, but my team are improving. They show good intentions before the game in training and they do it.
"They show better character. It's about top mentality and they showed that to get the results we have had in the last few weeks."
Martin Jol insisted confidence is the key behind our excellent recent form - Saturday's 5-1 win against Southampton made it four on the trot in the Barclays Premiership, our best sequence since 1995.