SE were already warning us before the launch that they were expecting severe difficulties playing on overpopulated servers, and now there's confirmed to be an ongoing third-party attack on the NA servers as well. So yes, it's going to be very bad for the next week or maybe two.
The reason I'm advising you to wait is because it sounds like you fear potentially regretting a transfer, and as of right now, such a move would be irreversible - in other words, a permanent solution to a temporary problem.
Roll an alt on a lower-populated server for now if you really can't stand it, but don't make any permanent decisions until things have settled back in to the normal state of affairs.
The reason I'm advising you to wait is because it sounds like you fear potentially regretting a transfer, and as of right now, such a move would be irreversible - in other words, a permanent solution to a temporary problem.
Roll an alt on a lower-populated server for now if you really can't stand it, but don't make any permanent decisions until things have settled back in to the normal state of affairs.