The 30-year-old's form at Goodison Park this season has seen him become a regular in Roy Hodgson's England team, and he recently penned a new deal at the club until 2017.
Jagielka believes that the side's overall performances have been excellent, and says David Moyes has assembled his strongest squad yet since joining Everton.
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"That was nice, but I think it's easy to play in a team doing well when the confidence is up there. When we're not doing well, especially as a defender, it is a lot harder to perform at a good level.
"But the team is performing well at the moment, and that's the be all and end all. If you can chip in and play well as well, it's a bonus, and most of the squad have been doing that this season.
"We've got a lot of options and we've got a group of players that have been here a while now. We're so close as a unit and we've got a lot of players with attacking flair that can score goals and create chances.
"We've got a good blend of young and old, so the squad is definitely up there with the best I've been in. We've had a good start to the season and hopefully we can have a good rest of the campaign and progress from there.
“I've signed for a few years and I hope we will go further up the league and be in this situation year in and year out."