I did see some tests of the e3300 compared to the e5200, a 2140, an equivalent AMD, and an older generation celeron. At just stock speeds, the e3300 did a great job at whomping the older celerons because of the bigger cache, did better than the 2140, and in general scored 5-7% below the e5200 basically because it could not match its bigger cache. As for the AMD, the e3300 in general ran rings around the AMD except in a few areas where AMD design was at an advantage. In general, quite an impressive results from a chip that will be the new intel version of its bottom basement priced celeron. And the link I did not copy also implies that the e3200&e3300 may be even more overclockable than a e5200 due to its low voltage reqirements.
The lone fly in the ointment is present pricing, the e3300 costs the same basic amount as an e5200 when I did present price checking. But if future pricing places it $30.00 below the e5200, I think its going to be the chip of choice for low priced systems.