The big diffrence between Israel and US..

Tennis is an individual sport! it is so different to play for yourself than to be on a team. You need to take care and responsibility for everything. You can't accuse anyone for bad scores except yourself because you are working for yourself.
In tennis you play singles matches and getting ranking for you as an individual.
Of course that you can't practice by yourself, I mean you can but it is expensive, so you have a team but still everyone practice for his or her success.

Here in the US, it is my first time that i'm on a team. I mean, I have teammates and each of us want the team to be success.
When we are in tournaments we are still playing singles matches but if you are win it's a point for a team, and we are competing team against team.

This is the big difference between Israel and US and it's not about speed, coaches or no matter what.. it's about the way of playing and for what you playing for.