That statement needs to be parsed. 
- "the first" - no, that's marketing BS. IB was a latecomer to retail forex, and a number of ECNs had already been there for a long time.
- "interbank quality spreads" - I was never an institutional trader, so will let others comment on that. Within retail forex, IB's spreads are highly competitive most of the time on the pairs I trade, but at times can get either wide enough or far off the market enough, to be untradeable. And I'm not talking news release times. Another reason why you can't rely on just one forex dealer.
- "institutional size" - not even close, unfortunately. I wish. They've made evolutionary changes in response to feedback, but are still not competitive, size-wise, even with many bucketshops.
- "no conflict of interest" - yes, absolutely. It's your basic ECN model, the way forex should be.

- "the first" - no, that's marketing BS. IB was a latecomer to retail forex, and a number of ECNs had already been there for a long time.
- "interbank quality spreads" - I was never an institutional trader, so will let others comment on that. Within retail forex, IB's spreads are highly competitive most of the time on the pairs I trade, but at times can get either wide enough or far off the market enough, to be untradeable. And I'm not talking news release times. Another reason why you can't rely on just one forex dealer.
- "institutional size" - not even close, unfortunately. I wish. They've made evolutionary changes in response to feedback, but are still not competitive, size-wise, even with many bucketshops.
- "no conflict of interest" - yes, absolutely. It's your basic ECN model, the way forex should be.