Again, that's the case, because there is orders of magnitude less activity than in Bitcoin. If the on-chain volume goes up by a factor of 100x, things would be noticeably worse. Let alone if it went up by 1000x, or 10000x. In those scenarios, it might be impossible to sync up, because verifying a block might take more than 2.5 minutes.
Recently there has been testing being done by voluntary people on a testnet with this in mind, to stress test current version.
https://www.reddit.com/r/Monero/comments/1doyde9/stressnet_first_week_report/Most transactions processed in an hour: 33074 (equivalent of 794000 tx per day)
So about as high as current Bitcoin charts show, I did not read the report yet but it's interesting to see how it went.
I wouldn't call that "scaling". It's just linear growth, parameterized according to on-chain demand. It holds as much water as telling me that Bitcoin Cash is 8 times better in terms of scaling, because it has 32 MB block size. True scaling comes with transaction compression, such as using one UTXO for several off-chain transactions.
You're right, block size alone does not solve scaling but it's a big part of it.